by hardencock
The old 'accidentally slipped into her ass' trope... but she DID wind up liking...points for that.
GF back in college said she'd 'come like a machine gun' when I was rogering her rump w/well-lubed schlong....
Happen for me....I was so horny and humping her.....
I didn''t know I had penetrated her ass from behind....It felt so amazing, I went "animal" on her....Her whimpers I might have mistaken as pleasure moans and gave her every inch deeply. Was the next evening when I saw her and she commented that i was not allowed to touch her ass that it became clear what had transpired....