Fucking a chick while she pegs...

Ok so i have been getting a lot of cuckolding and mmf opportunities coming my way; and i am very grateful and appreciative i am curious about something. Now i'm open minded and have no problem if a dude wanted to suck my dick ( i would just explain that i appreciate the compliment but not my thing). However when in a situation of threesome or cuckolding and they are wanting to get incolved with me i been wondering a solution around this and think i have found one. Now i'm not sure how many couple are down for the pegging but i feel if the husband wants to be a bottom then it shouldn't be a big deal.
If i was to fuck the lady, while she fucked her husband do you guys think that would still work? I mean it's my thrust that he's feeling, just translated through his woman. Is there a porn that is like this? Would really like to hear others thoughts on this...