Sounds like she knows you well. You sound a little bi, and that’s all good. As much as I like the idea of seeing my wife fucked and enjoying bigger dick, I don’t think I could ever suck a dildo, let alone touch another man. I remember trying to get my wife to do anal and she said “we both have asses, if you can take a Dick up your ass, then maybe I’ll try it”. That was the end of anal pursuit, unfortunately. I think once you go down that road of role playing sucking dick or ass play, you’re on it. And if that’s what you want, it sounds like your girl supports you, completely. I think with a little more communication, you can make her support you fully. Good luck!
