Lmaooo I was reading this chapter feeling very conflicted because secretly getting someone preggo is big no no but both wanted it?!? then I read this and was like yaaaaaa! Exactly XD. They found their matched crazy. However I do think MLs switch from wanting no children to wanting children very much (and secretly) is a big of a hard 180°
I think his refusal to have kids might be more about him being sick of his grandfather nagging him. So he says he "doesn't want kids" because he wants his grandfather ro stop making a big deal out of it. But now that there's someone he's actually interested in he's like "oh maybe I DO want kids?". I could be wrong cause I'm so bad at remembering stories but this is my theory

they wanna baby trap each other so it's a win?