me vs mother in law

I met my husband when I was 12 yr old we were best friends for years before getting together. this might sound horrible but I thought his mother was died because he was raised my his grandmother and anytime I asked questions about her he would just shut down and not say anything at all... fast forward once we got together 5 years ago I met his birth mom over the phone, it all came about when he moved into my apartment I noticed he worked alot his half of the Bill's were paid but then he didnt have any money -_- I couldn't understand were the rest was going. till of course he told me he had been sending money to his family back in DR and his mother in a different island. now I knew he had his step father and his 5 siblings that lived back in DR but when he told me about his MOTHER I was confused. anyhow I'm trying to make this as short as possible bare with me lols. she tells me over the phone at 5 she sent him to the US with his father to give him a better life but that in return she was expecting him to help out the rest of her kids obviously from a different father so that he could eventually bring them to the US as well. I thought she was crazy but said nothing. fast forward I get pregnant a year later her first grandbaby she seemed excited called all the time to see how the baby was we became close. then one day she calls asking for $200 me and my husband put 100 each and sent it then it became a monthly thing next thing you know her daughters are calling asking for money as well I looked at my husband and said this is what you deal with of hell no we about to have a baby we need to save enough is enough. she calls a few days later asking for us to send for her the paper work would be 1200 I told her impossible I live in a 2 bedroom apartment how am I going to give you my child room she tells us shes pregnant and I'm like WTF. fast forward i give birth and get pregnant again, she gives birth and gets pregnant AGAIN. after a few month of no communication she calls crying saying shes stuggling so we made an agreement she would return to DR with her now 2 smaller kids and would marry my husband step father and we would sent for him, her and the 3 youngest because the rest were over aged. after she agreed we sent her 1000 to get her and the babys paper work in order to get her back to DR she disappeared. calls back weeks later saying she had to use the money on other things for the babies I told my husband flat out I wasnt sending a dime anymore. fast forward me and her got into it she told me hmu husband would do whatever she asked for cause my P***y could never give him what she gave him "life" I laughed and hang up. 8months later NOW she heard from the family we buying a house she called and said the minute its brought she expects to be sent for I laughed cause she doesn't know I'm the one buying the husband because I refuse to let me husband or his family make me feel like I'm obligated to being her or her kids call me a bitch, this women put me though hell and back and almost broke up my family when she hasn't seen her son in over 15 years. now my husband feels bad cause he wants to try and help her and the rest of his siblings back in DR but I refuse to let anyone like that come live in our house. I dont know what to do wi th hot feeling like I'm letting her win or feeling selfish.

I know I sound a bit controlling but when I was pregnant with my first son me and my husband couldn't see eye to eye he ending up cheating on me and I didnt find out till after i had my son I forgave him but I never forgot and I promised myself that from that day forward everything I did would be for me and my kids and even though hes included in every plan I make the day he decides to leave us we wont be without. I've work hard to get over the heartbreak and give my kids everything they need and theres no better feeling than leaving something for them the day I'm gone.