Mom drops her bathrobe for son and wants him to fuck her

I am walking down the hallway, Mom comes out of her room dressed only in her bathrobe. She stares into my eyes for a moment with that serious look and with a jerk of her head motion me to follow her into the bedroom. She stares at the me for a moment and drops the bathrobe, sits on the bed and leans back spreading her legs and turning her head away and closing her eyes. She unzips my pants, pulls out my cock and motions me to start fucking her. She smiles and winces with every thrust. This goes on for a couple of minutes until I cum has cum. Mom gets up, looks at me, she puts on her bathrobe on and goes into the bathrobe.