Sex education for a slightly nosy braless housekeeper

I ended up working as a housekeeper at a house where a father and son lived together. According to what I heard from his father, his mother passed away six months ago, and his son, Keisuke, became a shut-in without going to school. "I'll do my best to get Keisuke back on his feet!" I said, but what should I do? Come to think of it, Keisuke-kun apparently loved his mother's breasts when he was a child...