<human>: Can you provide a brief rundown of the text in within 3 sentences?

This actually happened last night,and I know a bunch of tifus like these aren't true,but as a random internet stranger,I promise you this is. Anyways,to my story. Last night me and my gf went to bed,we talk for a little while about random stuff then she randomly asks me if I would ever want to have a threesome..now I know the answer I want to say,but its not the answer that should be said. I told her even though every guy wants to have on,but no,and that I want all the attention on her and that she would feel jealous and other things with another girl there,which I do believe,but  of course I want to have one,but I dont want her to be hurt. So then a minute passes and she says "what if just I have sex with her and you just fuck me?" To which im confused by again and say it would sort of be the same I guess just a little better since I would be focused on her. I ask her why she asked these questions and she said she just wanted to see if I said the right answer. So at this point im very confused,but whatever. A few more minutes pass and then she asks me.."what if I had sex with a girl and you watched?". I thought about this for a minute but at the time I was like that would be cheating sorta,so I said that. She said she understood and laid back down. And im just sitting there thinking wtf? Then I hear her sigh and i was like what? I asked why she sigh and she just says "oh nothing" at this point I really think she wants to. A few minutes pass and she starts crying so im trying to calm her down when she says "I just really miss girls but I don't want to cheat on you"..and im like okaaaaaay this is not what I expected. So we talk for a little bit and came to an agreement. She can have sex with a girl as long as I approve and is in front of me. Now im starting to think she wants to have a threesome? Needless to say,my night was very confusing that nigh.
<bot>: Told my gf I dont want her to have sex with a girl in front of me or have a three way when she secretly wanted to..