Well when she used it on Toby, he felt that fighting was wrong and wanted to help Grims.
You could get him to try to kiss or think about kissing her then she touches and he thinks its wrong (one night stands are wrong, i could break her heart blah blah blah) and maybe says they should hit the sack? Or maybe takes a good house guest demeanor, i don't know.
You could ask Rena about it? Try VMing her!