yeah, i guess that could be done. its usually a cutaway shot in most scenes what you're describing. you would see her face, some boob, and the guy behind her a but maybe.
sounds kinda hot. but there's not much action for a lengthy shot.
Wasn't there a site that did the split view type dealio?
They didn't do specific positions but say she's bent over a bed; you'd see in half the frame her face as she's getting it on and the other would be the side shot for penetration.
I just think it would be cool if the camera was showing her sucking "your " cock and then it pans up to show the other guy fuckig her. Lol thats the shot i wanna see wether its a true dp or not.