Why didn't he tell him he could get pregnant that's so messed up to me idk

Oh well I don't think it will be a big problem ( ° ʖ °)

Seolhyun doesn't remember or someone mess his memory. He only knows that his a male lycan .

Which in truth he’s a female and his brother (that it was stated here they’re not blood related) is the male
I guess the main idea was for them to be together and that way they’d be maintaining the pure bloods