Stepdad confuses her stepdaughter with his wife and fills her with cum by accident

That afternoon while i was playing my video game, my stepfather lay down with me... He was thinking i was her wife but no, i am only his stepdughter... i cannot deny my constant fantasies about him fucking me hard and lucky for me he confused me with step mother since we're really alike and he fucked me in bed until filling me with cum and he left like nothing happened.