<human>: Give me a shortened version of the text

Not sure if this is the right place for something like this, but here we go:

This girl I know is coming back into to my hometown for Christmas. She asked if I wanted to have a threesome with her friend. Id be totally down for it. She told me who it was. It turns out the girl she wants to have it with is one of my old friend GFs. Me and that friend were best friends, probably for about 3 years when we were like 10 then we kind of had a falling out. 

5 years ago, 3 years after me and the friends falling out, that friend killed himself while dating the girl that wants to have a threesome.

Now im in a moral conflict. Any advice on how to handle this. I wont be able to respond to questions quickly because I'll be at work so I try and give a summary of answers to what I think I would be asked.

I would like to have the threesome.
Am I bad person for doing this?
Potentially disapproval in my group of friends if they found out, had basically same group of friends since early years of my life.
Should that girl be treated as off limits?
<bot>: 2 girls want threesome with me, one of them was one of my old friend's GF who killed himself 5 years ago. Moral conflict arises.