why his mother is jealous? and what will you do?

that's sounds like my mother-in-law! She was like that to me too. After we got married she didn't hug me but my father in law hugged me and was so happy and of course she wasn't too happy! Give her time to get over it. I found that she just didn't want her son (my hubby ) to marry and she baby him too much but she sure does give me hard time during my marriage she would call him and want him home. It took awhile for us get to know each other better but I can still feel that she is still unhappy about us getting married. By the way we are still together for almost 25 years shouldn't that make her happy? But she passed away 10 years ago. For your advice give her some time and she will come around adn she may not show it but I am sure she cares about you too. Good Luck with your futer mother in law. :)