"It looks like you need some sun-tan oil"

I say as I walk up to her.

Millie smiles, and says:

"Oh, do I now?"

I grab the bottle of oil and squirt a bit in my hand, and begin rubbing it on Millie's stomach. Millie does not say anything, just smiles as my hands start to move up and I am applying the oil to the bottom of her big tits.

Millie leans her head back, her naked big tits pointing up in the air, and says:

"Oil my big tits for me Matt."

I begin to rub oil onto her big tits with both my hands, kneading them softly until they are nice and shiny. Millie keeps her eyes closed, but she is breathing a bit heavier and I can feel that her nipples are hard.

I keep oiling up her big tits, and to myself I think this is great. Here I am, fondling my step-mom's big tits, and she has no problem with it, she is even enjoying it.

I feel my cock starting to strain against my shorts. I desperately long for getting my cock between Millie's big tits.