At some point, Taehan gotta talk it out with Doyun about their future ; marriage and whatnot. If Doyun gets pregnant, what if Doyun becomes anxious and wasn't prepared for the responsibility ? It'd be like Love is an Illusion all over again. Doyun did already taken aback when Taehan mentioned "marriage".
Ouh no, the seme wants more and the uke is oblivious (/TДT)/ THEY NEED TO COMMUNICATEEEEE !