Looks like his stud was stupid and buying it. As they moved, he looked back only to ensure he was being followed.
"I've put on a spell to protect you, don't worry. There will be clothes to steal and blend in, in certain. You want to get back more of the kidnapees and get even with those impish curs, don't you?"
Coming up on the portal, it was time to make his slave loyally walk through.
"You can go from here... but be careful. That is, unless you'd let our chance pass to save the others."