If I were her, I'd have confronted him, in front of witnesses, right at the beginning. Then he would have known his project was unfeasible, because he could never find another Maho.
Satsuki put Maho in danger just because of her selfish need to "save" him.
Actually, everyone in this manga is a moron.
Even Aoi who never said she saw him stalking Maho several times.