Sex - Reverse Cowgirl

You switch the position to reverse cowgirl.

"Gosh...I...I don't know if I can do this..." Da stammered as she lowered herself onto your cock.

"C'mon, you can do it! Trust me!" you encourage her, and she ends up obliging by riding you at a steady pace. This also gives you the opportunity to fondle and squeeze her ass as you thrusted upwards within her.