Not so much funny as interesting. My wife was similar.
My wife and I discussed MFM with a long time friend of mine, Dave, that she knew over a 20 year friendship. She had never done anything like this before. She wasn't scared, she was more curious as to how it would start and what would I say to Dave to even suggest the subject. I told her that I'd tell Dave that if he
"came over on Sat. that there'd be a pretty good chance for a 3 way with Faye (wife)
as she seemed curious about it". She was okay with that explanation and gave the green light.
This is an example of how it started: In the bedroom. She knows to suck cock to get Dave hard. But her legs are closed, a subconscious defense mechanism? Gradually she gets more comfortable with the idea and subconsciously she spreads her legs, an invite? She gets more active in the blow job, even reaching up to cradle Dave's balls.
And yes, she will let Dave fuck her and even encourages him to cum inside her when he's ready to release in her Missionary style and says, "I'm going to cum inside you". She says, "Go ahead, I can't get pregnant".