Would you do it?

I'm definitely Pansexual. I have no sexual preference whatsoever, I find every gender attractive even in trans. I've only slept with one girl and a few guys. I'm currently engaged to a guy I've been with since I was 15 on and off, we have one beautiful baby girl. I fantasize of women all the time and even masterbate to lesbian porn with my boyfriend watching. We've thought about trying a threesome but I haven't quite gotten my mind made up yet, my boyfriend is also bicurious. I've been in a threesome before but never with someone I cared about or was in a relationship with, it was with a girl friend and her boyfriend during a time that me and my current fiancé split. Would you have a threesome with your partner and someone else?