Try again with her saying she love big cock and her thrusting for it to go deeper and you not showing your ass. We want to see her ass and pussy not yours.
Yeah that position is not good for making a video .. his / or her legs need to closed .. stiffer bigger sleeve .. just take a look at the guys with massive cocks doing this position and just copy
Use 2 .. one that is a little stiff .. then one that is like a real cock sleeve that will be held in place by the ball loop .. that should get you up to 8 x7