No!

With that she pops out and sprays cum down the hallway. At this point your mom comes around the corner, "We are ready for you. Are close? Will you be able to do a huge cumshot?" she asks. You nod in the affirmative as you admire Belle's continuing cumshot.

With that you follow your mom into the studio proper and see Sarah on her knees waiting for her facial. Your mom takes you to a little taped x mark and has you stand on the x facing Sarah. "OK, so, I'm going to stand behind you and will be jerking you off onto Sarah. Just reach behind me and tap my leg when you feel like you are going to cum and I'm going to be moaning and doing my lines. Do not get into frame of the camera. With that my mom got right behind me, I could feel her massive tits pressing into my back, before they could start shooting, Sarah noticed a problem. Your mom's dick was between your legs and was poking out further than your own. "Well I guess I'll have to hide this somewhere. Glad you're already loosened up." With that said, your mom pulls back a bit and inserts her entire cock in your ass. "OK, for real this time." Your mom starts jerking your cock like a madman, at the same time making minor thrusts into your ass.

With all of these sensations you can feel yourself start to cum, you quickly tap your moms leg, letting her know. She quickens her pace on your dick and slams her dick all the way home in your ass. With that final push you start cumming, creating fountains of cum over Sarah. It lands all on her face and in her hair, quickly coating her in a thick layer of cum. Your mom starts aiming your cock lower and lower, making sure that she gets plenty of cum on Sarah's tits and stomach. Once your done cumming and the director calls cut, your mom say "Ohh, I think I can squeeze out a round two, if I keep fucking him. Do you want me to work up two a second cumshot and give her another coating?"