My (40M)Married Female (38F) Friend tried to start something sexual. What am I supposed to do or say?

My wife (35F) and I (40M) are very close friends with another couple. We met because our kids are in the same school grade and activities. We have gotten very close over the years. Invite each other out go to dinner together as couples. Do birthdays etc together. My wife is very close with her and I'm very close with the husband. Heck may as well be family.

Recently he and I have been working on fixing up their first house. They are in the process of seeling because they bought a bigger house. I was there doing some demo in the kitchen. Disconnecting water lines under the sink. She came by to see what we were up to. Not unusual. I was the only one there. Didn't see a problem with that. She went off to do whatever and a few minutes later I feel someone grab both my shoulders from behind.

Now you have to know we're the kind of guys that mess with each other and I wouldn't be shocked if he did this to screw with me.

Something seemed off so I turn around and there his wife/my friend completely naked. Yeah I'm a bit startled and probably froze. She grabs me and says something like glad you like what she and looks down.

I grab her hand and push it away and ask her WTF are you doing. She gets very defensive and says you're kidding right? You're telling me you don't want this and I didn't just have your hard (fill in the blank) in my hand.

At this point I'm beyond angry and storm out of the house and go out on the porch to collect my thoughts. She comes out a few minutes later thankfully fully dressed. She half apologizes as she's basically blaming me saying more or less you can't tell me you haven't thought about it. Yes. Yes I can. We have NEVER been more than platonic friends and I've never so much as looked at you as anything but a friend.

I tell her in no uncertain times that's not happening now or ever. And she gets very defensive and starts crying. I tell her look you collect yourself so whatever ya need to do but I'm leaving.

So here I am wondering what I did wrong and how do I tell my wife and my best friend what happened and how do I make sure she doesn't spin it around and blame me? Any trust I had in her is irreparably damaged and I don't think she's gonna feel up to her husband.

I get the feeling she's not about to tell her husband what happened and I feel like he deserves to hear it directly from me and clearly my wife needs to know what happened.