I prefer the older teacher idea too. Maybe the young mother is a single parent and comes to the school for her parent interview and starts having the feelings again from when she was in school and had a crush on her teacher. The older teacher recognizes her and thinks she is very sexy. He has no feelings for her other than she is a MILF. He locks the door and takes her in the room on his desk.
“They were the strongest hands I ever felt, he held me down by the back of my neck pressing my face into the mattress as his powerful thrusts quickened and his hard cock plunged into my virgin ass. My muscles ached from being so tense but he continued like a wild animal until he came inside me abruptly thus ending our date. He tossed the money onto my prone and sweaty body and laughed and slammed the door behind him. My boyfriend stepped out of the closet with the video camera and smiled and confirmed I was officially a whore.”