A women is making things up on my husband and making thing up what can i do?

like i found a myspace pag that this women made up and she was bretending to my husben to get me mad i go back up there a littel bet later and there is a coment that said haha kayla)me) realy thinks this is jason) my husben and that funny what can i di to stop her form doing things like this she is trying to brake my family up