Go in like you are.

"Just try to relax your butthole Becky."you tell your old crush. Noticing that your cock still has quite a bit of her slobber on it, you spit on her asshole, figuring that would be enough lube for the state she's in.

Your cock actually slides in fairly easily, until you are seven inches deep and to the hilt. Then she notices the invader inside her, clamping down tightly. "what the fuCK John II HAVE LUUbe on thaat taable" she points over at the small table with a single tube sitting on top of it.