To all the people saying that he is jealous please use your brain.
This guy is an adult version of Ain, he got 0 emotions so he is not jealous, he is not a simp he probably already had her in his bed because they are married, but now that his son and his « friend », are preaching love he want to know that feelings and he hoped that someone opened his frozen heart when he was still young and he understand that his wife might be able to