In Laws/baby momma

Lindsay
So I guess I need opinions other then my families. So my husband and I have been together for 5 years and married a year and a half. We had a destination wedding in Florida at where my family takes vacation!:) while down there my mother in law took my husband aside asking if it's what he wants and to re think what he is about to do.... Needless to say i didn't find it until not to long ago. But recently over thanksgiving and Christmas my mother in law thinks it's perfectly fine to invite my husbands ex his sons mother to the holiday functions all the time and tell her about our family issues etc... Am I wrong to get pist and shitty ? My husband has my back and same with me having his. But I don't think is normal?