When I went to her house, she was on all fours with her ass sticking out. Her beautiful ass always gets me excited, and I got an instant erection. "She's into it too... let's give her a little surprise lol," I thought, and quickly took off her pants and fucked her raw from behind. Her pussy was tighter than usual, and I couldn't hold back any longer and came inside her. Then, when she turned around, I saw her face and she said, "Oh... Mom?" I was in a real dire situation.