Whys my mum being this way .?! after all its my child and my husband ! (read onn )?

I think you have the right to know what your husband and your mom were talking about. You should ask your husband and demand to know. If he won't tell you then tell him to hit the road. He's already cheated on you twice anyway so you obviously can't really trust him. You should also tell your mom to stay out of your family's business. Why is your mom doing this? Because she's now a mother-in-law and they are famous for interfering in their children's marriages, but usually it's the mother-in-law not liking the son-in-law, not the other way around. There is something odd going on.