Before entering the house, Michelle remembered something and turned back to look at the group of men that surrounded them. She didn't need to think much to know that once she and Ivona stepped into the house, they would go tell someone of higher rank to come help.
And there was no telling how powerful that someone would be. So there was no need to risk anything.
Taking long strides toward the group, one by one, Michelle grabbed their foreheads and activated her memory manipulation skill. She made it so they remembered her and Ivona's presence in the city, but they wouldn't think about it unless someone stimulated it.
And even then, they wouldn't say where the two of them went. She made them completely forget that part before having them leave.