Ok all moms.......any advice?????

my daughter is almost 20 we live in PA........here is the situation....at the age of 15 she got pregnant....i said terminate thinking only of her life and how it will be but she thought she knew better so of course i supported her and she lives with me as does my grand daughter who is 3 now......my daughter got pregnant again last yr but she herself was like noway and did something about it and got on birth control...now listen to this....she is pregnant again for a 3rd time and wants to keep it which is fine that is her choice....but i told her that she can not live here with me she has to move out (she has her dad and aunts etc) she wouldnt be homeless......i am 46 yrs old and have dealt with all this all this time as parents do but i mean come on how long does a parent have to just put up with their childrens bad choices in life.....this would be kid number 2 for her and she is only going to be 20 she works at mcdonalds doesnt have a high school diploma and has not a goal set which is obvious by her choices in life ....i feel horrible as a mom saying well then you gotta move out but man.....im at the end of my rope here im not dealing with another kid and watch her throw her life away ....please what do the other moms out there think ( oh as a side note know this........she is pregnant again because the form of birth control she had (birth control pills) she just kept forgettin to take.....insane but that is the excuse she gave..............please any words of wisdom or advice or just any words of encouragement would be welcomed at this point........