what should I do?

April
Ok. A few year ago when I was married, our married friends use to come over every weekend. It was joked about how my husband couldn't keep up with me in bed . My girl friends responds was that I could borrow her husband so he would stop bugging her.  We never did back then but now I've been single for too many years and I haven't found a guy I trust to play with.  My friends hubby is offering ,what we had all talked on back then. I find him very attractive but I don't what to blow the friend ship. Help me please. It's been so long I feel like I'm forgetting things. But friends are more important ...  
Should I just have fun for a while 
Or should I just tell him that even though his one kiss fired me up to an almost uncontrollably action I can't sleep, maybe it's better to thinks about what would happen with him and his family reasons.
Or do I bring it up to the girlfriend about the old days and see if she is still on the some pg.

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