Partners friend wants to fuck her, first experience. Advice needed.

Hello, I wanted to get some advice.

My partner does "online work" (which by the way im totally supportive of!) Somebody she knows and aparently mutually fancied eachother in school (20 years back) found her online content and messaged her on her private socials asking to meet and if she wanted to have sex. Hes in a long term relationship and claims to be in a "open relationship" however, were lead to disbelieve as he is asking to meet on his own.

now, we have been pretty open in many occasions and have talked about fantasies and kinks before and many years ago joined a swinging sitr (never met just talked and cammed with others) so i guess deep down we would be open to this opportunity, however weve never done this before. She did say no and she wasnt interested but, if she fancied him and hes now asking to meet for sex i think if she said yes then obviously it would turn into a meet..

One worry was that he could leak her content knowing who she is to friends and family so wanted to kind of tread carefully on how we went about it. She has replied and said please respect my privacy feel free to enjoy my content but please dont aks to meet because i dont meet guys as part of my "side work"

Ive often watched cuck/hotwife porn and really loved the idea of another man having my partner and her having a great time, shes also mentioned previously that she'd like a guy to join, or me watch her with another guy. (Likewise shes mentioned a female or couple to join/swap)

I feel its abit awkward situation rather than maybe meeting on a swinging site ect but since this has happened ive had a few moments to myself (should i say) and watched some "hubby watches/films" kind of movies and really had some rock solid throbbing pleasure from the idea.

Id love some advice, what to do or to think about and maybe some consiquences of this particular meet ect.

P.s we are long term partners and have only ever played with eachother. Id be open if we did this situation to be part of it as a threesome, but also as a cuck (made to watch) or letting her get on with it and maybe filming it for me to watch back later.