I go into my step-sister's room at night and end up silently having sex with her husband.

The sexy redheaded sister-in-law with big tits enters her sister's room to look for her brother-in-law and start touching him. He wakes up with a very hard, hairy cock and begins a sexual adventure with his sister-in-law without his wife noticing. They continue fucking until he cums in his sister-in-law's pussy.