What is up with my neighbor?

We had a neighbor move in next door about two months ago! We tried to be neighborly ya know mutual respect, helped her move some heavy items in wave when we see her.. about two weeks after we moved in she started having extremely sketchy people visiting at odd hours which isn’t our business but they beat in the door so loud, honk horns and are overall just obnoxious to the point it wakes my newborn up! She even had a man looking in our backyard at my kids and nephews playing until my husband went to ask If he needed something and he ran off We’ve tried speaking to her and she just apologizes or acts confused we’ve talked to the landlord and he said she told him she’s in bed every night by 930 only has females over during the day time. I don’t think I should have to move, we love our home but idk how to handle this situation.