Wait...is Asmo a REVERSE-TRAP?!? That would explain the massive suspicion I've had about 'em. It could be possible that Asmo dresses as a man to either:
1. Avoid any attention from men due to his/(her???) Mom being literally the master of seduction/lust.
2. Or just hates how overwhelming THOTish mother is. Like a manhwa I started reading (and subsequently dropped) was about a guy who hated perverts and porn since his dad is a AV director, he would straight up not get any erection from anything lewd. Might be similar to that but in the manner of seduction and feminity.
But besides that Silvia is adorable.