My husband is very close to his mom.and she has higher value than me.she persuade him to visit his cosin.?

my housband calls his mom every 2 days.he calls her from his office in the morning.when he was single ,he called her once a week.after we married ,i don't know what she did that she creat a close relationship that he consults with her in every case and he listen to her advises.he has a cousin that i hate she and her housband.and my mother in law all the time wants my husband to visit them.she has made my housband so courageous that he says if you do'nt come to their home ,i'll go myself.the reason I hate his cosin is that in our wedding she had annoyed my mother and shouted on her.so my mather don't let me to visit her any more.