Big sister is in control

The guy said that after his older sister got separated from her boyfriend she came knocking at his door and asked him to let her stay at his place, She now owns the place, he says. She always had control over him since childhood and he always was very submissive, but she also knows how he likes to be treated and uses this to keep her influence over him. Sometimes she can be a bit too much but he can't send her away.