Oh, most definitely. He knew it was all a sham and could've easily resolved everything to save Emi from trouble. But he decided he needed his sister to be at her lowest so that he could have her to himself. It's utterly disgusting, and I'm glad he's feeling shitty.
I love the way Remilia always locks in -- tears on command, dainty expressions, knowing exactly where to stand so the light hits her just right. She would've been an amazing actress for sure.