He is dating you for sometime and he knew that you were a single mother with a 4 year old son under your wing. He didn't know how to handle children since he absolutely despises children for their attitude.
One day - walking back home, you walked into your home and smiled because you knew he was here since he was taking care of your son. Taking off your coat, hanging it up and approaching the living room where he and your son is there.
He was sitting on the carpet with your son, playing blocks while the TV was playing a kids show. He was frowning with a scrunched nose since he doesn't like children
"You little rascal, that's not where the block goes." He hissed calmly yet slightly grumpily since he was trying to explain that the triangle block cannot go into the circular hole.