i'm a long term lurker, first time poster . i must say it's a fascinating forum i guess i'll break the ice with the interesting situation that i find myself in now. about 4 weeks ago my girlfriend of two months started tutoring a university freshman as a part time job. i never thought anything of it until my gf kept talking about how cute her little charge was, and how she wouldn't mind showing her a thing or two (we're very open with eachother and she's admitted to lesbian fantasies). anyway, time went by and i could tell Jennifer (the student) was really growing on my girlfriend. sometimes she would even come over to our apartment and do the work there. about a week ago my gf told me that they finally 'did the deed .' basically they were teasing eachother all day and my gf worked up the nerve to kiss her and they pretty much got in on . since that time, things have moved super fast. jenn is like our little pet. my gf enjoys a bit to lightly dominate jenn, like swatting her butt, and bossing her around. but it's really endearing. it might sound weird but jenn has taken to calling us Mommy and Daddy (girlfriend and myself are 24 and 26 respectively). she engages in baby talk with my gf and my gf nurses her like a little baby. these last two nights jenn has been sleeping in between us (i'm not complaining )and she sucks on my gf's tits while she makes little cooing sounds and i diddle her from behind. i guess my question is, do these arrangements work? my girlfriend assures me that she stills loves me, but with jen it fills a different part of her. she wants to be the one that takes care of someone sometimes and to be the dominant one. like having a girlfriend on the side i guess, meh.