Husbands attachment to his mother

I need advice ladies, i have been with my husband for almost 10 years and it seems that the older my in law gets the more attached he is to her and viceversa. Don't get me wrong i love that he is a loving son as that shows he is a caring person but its gotten to the point where he gets out of work and he goes straight to her house amost daily and when he doesn't she is calling him to go over and do her favors. Ex: fix her roof, change cables build furniture, go with her here or there and its getting ridiculous. He is 1 out 5 of her children and 3 still live at home with her all older than my husband. Im pregnant and have a 3 years old and i work a fulltime job, i have been asking him to help more around the house because i am having back pains and because its not fair he doesn't mind doing all these things for his mother but doesnt like to help me his wife of almost 10 years and mother of two. I feel unappreciated at times and i feel like he doesnt consider me the way he does her. No im not jealous i just feel like he has an attachment issue, if we go out as a family he wants her to come out with us and if i say no then she comments why we didnt inviter her. I feel like she also has attachment issues with him and has many other children. But i need advice as this is affecting my marriage and we are arguing about this constantly..... How should i handle this ?