my step mother forced my sister and I to call her mom. When it…

my step mother forced my sister and I to call her mom. When it was time to teach us about the “birds and the bees” she had a very hands on approach.

she thought that the best way for a brother and sister to learn about sex would be to practice on one another, under her tutelage.

this time she did all of the foreplay on my sister and I until we were ready to for our lesson.  she had my sister climb on top of me and bounce up and down on my hard cock.

The whole time our step mom was asking me how my sister’s pussy felt. I could hear my sister’s moans and gasps become more panicked as our step mother made tiny circles around my sister’s asshole with her fingers. 

“awww, that’s it you two. Cum for your mommy.  make mommy proud.”

when i came inside of my sister, my step mother would make sure to clean us both up.

I’d feel so ashamed about what I did to my sister, but what would you do in that situation?