I want to disagree, to say that's too extreme, buuuuut...
Nah. This guy is SCUM. Even in the real world, leading tons of people on and going "I'm just an innocent boy don't be mad uwu" is NOT nice behavior!
For real, I guess they don't think 1 adult plus 1 adult is a good combination.
Age gaps don't really matter, especially when it's an arranged medieval marriage.