How many children are allowed in a 1 bedroom?

I just moved into a beautiful, quiet community in Texas and have been enjoying it very much. I also work from home. Over the weekend someone moved into a third floor unit, directly above my head with not one, not two, but THREE children. 2 are toddlers who appeared to be twins, and a baby who was in a carrier seat, all troughed up stairs. When I went to go get something off my balcony last night the lady said "oh I have three babies! Let us know if we're ever too loud" I was like what??? It was almost like she was saying well this was just a problem where I'm moving from so now here I am. This morning at about 2am to about 5, all I heard was the thunderous running of what sounded like 100 children. When I ask the leasing office about it, they said they are not legally able to give my any resident information. I explained to them she flat out told my herself. The property is brand new and they have been having struggling to fill it, I feel like they are not going to care? Help! I just signed my lease 2 weeks ago!