Your girlfriend loves going out and fucking other men, which you also love having a girlfriend that fucks other men. But you two are trying to get pregnant, and you put up the boundary that she's not allowed to get creampied by anybody else but you until it happens. This morning she came home from her date with all of the condoms that you bought her, minus one. She confesses to you that the guy she fucked was way too big for condoms and ended up ripping right through the magnum. She is ovulating right now and his massive cock felt so amazing her tight little fertile pussy was milking him so tight he couldn't pull out in time; and ended up cumming buckets inside of her. When she got home, she took one of the plan B pills from the emergency stash but decided that maybe this was meant to happen. Since you've been having a hard time impregnating her, maybe she should let someone else give it a try. So she strokes your cock and tries to convince you to let his seed fertilize her.