Yes

"F-fine..." Feigning a bit more **** than you really find yourself feeling, you hand Fiona the phone and get on your knees in front of her. As you grab her dick, she lets out an approving grunt, letting you take over. Meanwhile, while holding your phone in one hand, she begins fiddling with it using the other.

Her cock's massive, and it feels a little weird grabbing one from the other end, but before long, you're steadily using both hands to pump Fiona's massive cock. Your own neglected member bobs about, as rock hard as ever, but you barely notice, as fixated as you are on massaging the massive piece of throbbing meat in front of you.

Fiona busily taps away on your phone, and you kind of wish you could see what she's making Allison do...but missing a bit of a show is worth it to have a chance doing Allison in the ass before Fiona's huge schlong 'raises the bar' too high...

After what feels like forever, with even your arms getting tired, Fiona's panting voice tells you to "pump it harder...gonna cuum!"

Caught up in the moment, you tighten your grip on your sister's cock and stroke it even faster, feeling it pulse and throb as, with a torrent of moans and incoherent swearing, Fiona begins emptying her balls. The stored up semen floods up the shaft of her cock and flies out explosively in one load after another.

You're pretty sure she'd manage to get it halfway across the room if it had an obstacle-free flight path...instead, it splatters all over you, drenching your face in what seems like a never-ending torrent of semen.

You shut your eyes and sputter, feeling completely overwhelmed. By the time Fiona's done, you feel like someone's pied you in the face...