Fuck her pussy!

You look over at the shower wall with the showerhead on it, and seeing the full length mirror underneath it, you get an idea.

"Turn around, Katy, I just thought of something." You say, and she complies, giggling.

Reaching down, you play with her ass cheeks for a second, and then grab the inside of the legs, and lift her up, her back to your chest, her body getting sprayed with water, legs spreadeagled, and start rubbing your penis at the entry to her pussy.

"God, i'm so wet!" She moans, "Just stick it in!"

Not needing any more encouragement, you slide your cock into her, popping her hymen on the way in, and keep sliding until every last inch has filled her. She gasps in pleasure, and you start pumping in and out, slowly.

Over on the toilet, Mary keeps masturbating in glee.