I don't keep up to date with the stuff from the author, this was over a month ago, and I actually stopped reading then so all of my knowledge were the most recent chaps at the time. I'm not too mad at brunette being the bottom, I really want them to switch after they mentioned taking turns having kids. As for the other person, submissive doesn't mean bottom, there's submissive tops. You can be a top and be submissive and it occurs in comics more than once. ¯_(ツ)_/¯ I used what evidence was available and tried to calm an argument that seemed to have other people at each other's throats. Sorry bout being wrong.
Literally IN the side story he notes his ass doesn't hurt and the blonde took him. Brunette is top and blonde is bottom, can they switch? I fucking hope so, but we haven't seen that yet. Atp it's implied blonde is bottom.
You don't even have to read the previous story to get that :') it says it right there.