My girlfriend s friends?

her father went to America for his health problem and he made me promise that i wont let anyone in his home until he comes and my gf can see her friends once a week.. but she has her friends coming almost everyday.. 1 of her friends left her sister to sleep at gf s home like here is a hotel and went to a party.. the next afternoon i m coming back to home and i see 1 of her friends i say ok 1 is ok.. but 2 hours later 2 more friends coming..and she doesnt listen to me i need an answer how to fix her or should i leave her because i m getting sick of this that i lie for her all the time her parents asks i tell them noone is coming i lie about her diet also to her parents.. her friends cleans all the drinks in refrigerator everyday... and right now i m cleaning her grannies diapers with her.. cleaning lady comes here cleans.. then she and her friends dirties everywhere..