Was'nt sure to post this in the "relationships" section or not,sorry if its in the wrong place mods!
On to my situation,well she is bisexual, and she has already had some "experience" with girls,(kissing,touching and toys). We've been together for nearly 2 years and its been going great, and she has mentioned to me that a "fantasy" of hers is having another girl in bed. She told me if this was ever to happen she would want me to watch or maybe join in. We've talked about other girls jokingly,lets call one of them "M". Ive hinted at including her but it hasnt gone anywhere lol, she told me she would'nt with "M" cuz she's not into her. She also told me it cant really be a "friend" that she'd do it with. We both feel pretty comfortable with this whole topic and my girl has tap kissed 2 girls in front of me for fun lol,so she's relatively "cool" with me bringing something like this up. Now I just need to figure out where should i go from here,any advice?

Well, you could just make a profile on okcupid with your girlfriends picture and explain in the body that she's looking for another girl for playing around with the two of you.