Family issues

So I am currently 19 weeks with baby number two....about 6 years ago my husband who was my boyfriend at the time was kicked out by his mom at 19 or 20 years old but we were the only one helping her...we packed our stuff that day and moved to GA with no money lucky one of his family offered us some where to stay for 2 months we walked to work in the rain,snow,icy weather me made sure we got there until we could afford transportation ...a year later she(mother in law)called because she got put out of her house and could pay her bills...me and my husband nicely agreed yes they could come cause he still had 2 younger siblings who could not find for themselves...we paid all the bills and all apartments were in our name and I lost my job leaving everything on my husband til I found a new one remind you mother in law still not helping and this is 2 years in and she has a job...we asked for money to help because we we were taking care of bills,the kids EVERYTHING...however my mother in law stayed with us for about 4 years and made a comment “ no matter what my kids spouse say they are obligated to take care of me” I instantly looked at my husband and said she got to go because then we had our baby girl on the way...so after she made that comment and told my husband she didn’t want to work anymore he told her she had to go because he getting tired of her saying what she not going to do...in the mist of this we are getting ready to have our daughter and lose our house because I had to come out of work for being high risk we asked her for help but she would have excuses...so her and the kids go back to NC meanwhile she is there for 3 months wouldn’t apply for food stamps or anything so she would call and ask for money remind you he has 3 other grown kids there in NC that should be able to help...meanwhile a year later she still doing the same thing and me and my husband has been stuck paying off all debt by ourselves leaving us struggling and my husband tells her every time she call I don’t have any money to give I have to get the baby milk and pampers...how can I not be rude or disrespectful when asking her to stop calling asking us for stuff that we don’t have? because telling her no we don’t have it and we are struggling hasn’t worked...like this cause me and my husband to bump heads because he feels I have no filter and I’m being disrespectful when I say stuff...but to me I feel like she thinks her kids must take care of her and it’s not fair...I have now become a fed up wife and sometimes I want to get my babies and leave because I cannot take it but I love my husband to much and I have been there through it all...