GF wanting us to go back to a normal relationship

TL: DR: Did some cuckolding in the last 2 months but now she wants to back to a normal relationship. Thinking of ways to change her mind without being pushy. Very difficult to find the sort of guy she'd like as she prefers doing it with friends

Been together 15 years, was open about cuckold desires from the start and brought it up regularly but there was no interest. Like a lot of women she didn't understand the kink at all and wondered how a man could share the woman he loved. Then a few months ago she became more friendly with a guy who has been part of her friendship circle for years. He's bi, just came out of a gay relationship. He was flirty towards her, and one day asked for foot pics. He was always respectful though. He was smart, taking baby steps to test her/our reaction. She found it fun to do the pics and I helped, but she was clear it wasn't going anywhere. Long story short, a few weeks later she agreed to a threesome.

I had reservations about it being a friend. A lot of obvious risks there. Also she is gorgeous, and I knew she could've gotten a far more attractive guy. But this was the only guy she was willing to do this with so I went for it. She wasn't going to want to fuck a man just because he was good looking or well hung. She liked this guy because of his personality, and because she realised she liked being pursued, having a guy making it clear how much he liked her day after day without crossing the line and sending dick pics or talking explicitly about sex. The threesome went well, she was nervous on the day but ended up relaxing and enjoying it as soon as we got started. Especially good is there were no next day regrets, she was genuinely happy and talking about wanting to do it again soon. The next day she said she wanted to go to his for some one on one time. I hated not being able to watch but on the other hand it made for more of a cuckold dynamic, me waiting at home desperate for pics, vids, info, anything, as they ignored my messages for hours.

She doesn't like to be degraded. She likes to be worshipped, she loved having us both massage her at once, having one of us give her oral while the other sucked her boobs or feet. We talked about my turn-ons and did some cuckold stuff, I liked eating her creampies, kissing her after she sucked him, had her lie on me while he fucked her, she sat on my face while sucking his dick. When he was out of the room, I told her that the next time I ask to fuck her, she should turn me down and tell me she wanted to save her pussy for his dick alone for the next few days because he fucks her better than I can. When he came back, we played out the conversation and he got a big smile hearing her say that.

I have enjoyed the submissive element of things. But usually I have to suggest to her a way to treat me or something nasty to say. One of the few exceptions to this was when she decided she wanted to watch him suck me off. He wanted to do it but I made clear over and over that I wasn't into it. She kept on being pushy, to the point that he started telling her that consent is all-important and to ease off. Obviously very considerate, respectful of him. But really I liked that side of her, if she'd told me to suck a dick that forcefully I might have got into it from a sub angle. Having a guy suck me off is 0% appealing to me. But I wanted to make an effort for them though so did it, and she really got off on watching and talked about how wet she was. I went to the bathroom to wash quickly and when I came back he was balls deep in her, she said she was so turned on she had to be fucked straight away.

About a month ago we got talking and I told her I loved the fun we'd had but that I'd prefer more of a cuckold situation. I also outlined several reasons her current choice of guy was not ideal. We agreed that I could set-up casual drinks with someone from online, but she wanted me to handle all of it, pick the guy, message etc. Once I set up a profile, over 100 guys messaged, 3-4 strong possibilities but one in particular stood out. They hit it off as soon as they met and we went to a hotel. Everything was phenomenal to watch. A lot of great moments. But afterwards she said that despite liking the guy a lot, it really wasn't her sort of thing. A one night stand with no emotional connection just wasn't for her. Her pleasure is the key factor for me, so I won't push for a drink/hotel internet meet-up in future.

We carried on the threesomes with the original guy and had a lot of fun. But when we met a couple of days ago he had too much to drink and brought up some of his regrets, bad behaviour. Nothing that bad tbh, typical NYE talk, but having previously seen him as a super-nice guy, my girlfriend was put off by his comments and once he left, told me she wanted to end things. She wants to go back to normal, not do it again with anybody.

As I see it, there is no type of guy, no sexual experience or fetish I can offer her to change her mind. Based upon above info, and knowing her relationship history, the only way she gets interested in a guy is if he pursues her, makes her feel a certain way. But that seems almost impossible to engineer.

We have a family and she gets overwhelmed, fed up with it all at times. Though I much prefer being able to watch, I let her go to his place for the night 4-5 times. I think she'd still enjoy having another guy she could go stay with once per week as a break.

If I had a friend, and he came round to hang out with me a few times and met, chatted to her a bit each time, something might develop. But my actual friends have girlfriends and would be off-limits. I could try finding someone on a sex site who was willing to play the long-game, but 'come be my fake friend for weeks or even months, no guarantee of sex at the end of it' is unlikely to entice any quality guys and sounds like something from a prank TV show. I have considered doing it the other way round, finding a new friend who has personality, looks that she would like. Then gauging their interest in one another.

If the internet guy had kept in touch afterwards (he txted her the next day and was friendly but that was it) and told her how gorgeous and great etc. she was, imo she'd want to see him again. In the days after they met, she she seemed open to seeing him when we discussed it. But he didn't message again. One angle I may work here is the gay stuff. If she wants to see me suck a dick, she can see me suck his. I'll even offer to rim him. I'll offer to do the same for any man she chooses to ...... with if it helps.

Aside from that, there are 4 possibilities.
1. A long-time friend of hers. She kissed him not long ago and sent a photo of it to me. She told me she'd like to ...... with him but changed her mind the next day. Still, there's something there. But he has a gf which puts her off, and he lives a fair distance away.
2. An older guy who messages her most days. Has never made a move but I assume he's not just being friendly. Have considered suggesting the 3 of us meet for a drink and I'd nudge the conversation in a certain direction.
3. A guy had a crush on her 20 years ago when she had a bf, they didn't keep in touch. He sent a friend request about 5 years ago, a few weeks ago she said she wanted to look him up but subject hasn't come up since and slipped my mind until now.
4, Most difficult, riskiest, but sexiest option: her ex-bf. Not heard from him in 7-8 years. He has a common Russian name so hard to find online. Hard to narrow down as he seems to move countries every few years. I have considered if it's worth spending a good chunk of change to have a professional track him down. Even if it could be done it's risky because our relationship is strong. I don't believe she'd ever leave me. But if she ever did, it would be for him. Sexy that I know she would do more sexual things for him than anyone else. He's well hung and had an anal fixation, she hates it but still did it for him 50+ times.

One side of this I didn't expect is her physically aggressive side coming out. She is not violent often, but she has a part of that in her. I dislike pain so it's not something we've done much of. He though said he liked pain and would she carve words into his arm, and she enjoyed doing that. He said he'd liked to be beaten up by her, which did for a while, but then she said he was responding to her punches like too much of a pussy, that she would only punch him in future if he could be a man about it and not let out any pain noises. Though not a cuckold scenario, if she wanted to find a man she can beat and cut while I watch, it'd be better than nothing.

I have considered telling her that while I want to eat her pussy every day, I will no longer fuck her. If she wants dick, she'll need to find it elsewhere. But overall I think this is a bad idea as it would cause arguments, make her feel that I'm doing it because I'm not attracted to her. Most likely I'll use a light-hearted moment to bring it up as a hypothetical and see her response.

Something that could be coincidental. She came off birth control a few month before all this happened and I noticed her sex drive went up. Because of the increased sexual activity, she decided to go back on the pill 3 weeks ago. Her sex drive has remained higher than usual, but her ending things makes me wonder. I can't exactly say 'I want you to stop taking it because it might make you want cuckolding again' but I do want to say something at some point.