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.
This age difference is extremely realistic, age differences such as this one are recorded all throughout history.
Only recently in modern days do we consider people of the same age marrying to be normal.
Might just be a translation error, maybe it was supposed to be something along the lines of "I made a girly noise" or something like that.
Idk though, maybe the author just phrases things super weirdly and the translation is perfect.