Is it possible that you talk with her husband and see whether he is a person to understand what the reason is? There should be some point before pointing fingers to anyone and no body has the right to simply jump into any conclusion without valid reason... As per law of nature (no body invented it till now), if the wife is an impatient one, her husband may be patient enough to heed and listen. Anyway, it would be better to report this issue to school and they have adequate facilities to councel both kids as well as parents. This issue should be closed as soon as possible and both of the parties to understand the real issue, otherwise, you both being staying in same building, it may be more difficult for both of you...