threesome ??

Meghan
So my hubby and I have been TTC but we decided to give it a break and just have fun for a bit. We have a really good friend that is a lesbian, her and my hubby are very close. We have talked about having a threesome. I am very selfish when it comes to my hubby but I know she is not into guys at all and wouldn't want him to touch her. I don't want him to touch her either and he is okay with that. He says that he wants it to be all about me as long as he can finish with me. Have any of you experienced this and could help me out? I have been curious about being with a girl but I'm to selfish with my hubby! I want to and he wants to but I feel bad that I don't want him to touch her even though she made it clear she couldn't touch him either. Any advice is helpful. :)