Mother in-laws can be over bearing and they can throw you off balance sometimes.
Some wives/ husbands are gifted with angels as mother in-law, while some are blessed with witches/ wizards "Forgive my choice of words."
In this part of the world, more often than not, women / wives are at the receiving end, so the tension most times are on them http://diraxclusive..com/2015/04/meeting-prospective-mother-in-law.html?m=1