We had these neighbours that would get into domestics so loud we called the cops a few times. They were migrants and didn't speak much English but at night we heard druken abuse and things being smashed etc. She was pregnant and they had a small child too. We shared a wall (two flats made out of one house type thing)
Turns out it was her getting drunk and abusing him. She even smashed their front windows.
She ended up going into rehab.
He was nice enough but he was always insisting I give my dd hypol the cod liver oil stuff. Claiming it would make her smart and was very important. They were a strange and somewhat sad couple.