"That Must Be What Love Is" - TLKOE Monster Dads fic

(Note for anyone confused: I wrote this fic last Valentine's Day, but I only just now decided to post it lol so that's why this fic is Valentine's Day related or whatever. Also, yes, this fic is for the ship Monster Dads, aka Thrull x Bardle, however this fic takes place in a Canon-divergent timeline where Thrull wasn...