NDN have a 13 month old. We have lived next to them since the baby was born, new born phase etc, all fine. The last two weeks the baby has woken me up every night crying, the cot is clearly up against the wall against my bedroom as it is so loud. Babies will be babies I know, it really is loud and for about an hour normally so it takes a while to get back off so I have been a bit tired lately. However last night it was just relentless, I was awake from 1am until 5am and the baby was crying the whole time. I couldn't hear anyone comforting the baby (same as normal, never hear mum or dad), I think she is being left to cry it out. DH went to sleep downstairs in the end because it was just so loud and my DD said she had a bad nights sleep. Around 5am it came to a head and I heard the mum shouting at the baby 'Go to sleep, just go to sleep' I think she left the room, then more crying then mum came back in shouting 'what is it? what do you want?' then her and her husband had an argument about being exhausted and there was some banging etc. Our walls are thin by the way. We have tried ear plugs. I get that babies cry, I have had two myself. I just can't take not getting any sleep, I was wondering about asking them to move the baby away from our wall a bit, but if someone had asked me to do that during a sleepless phase I probably wouldn't have taken that too well. On top of that I am not comfortable with the baby being left to cry for so long. Should I just leave it? DH wants to say something but I just don't want to make them feel any worse when they are struggling. The other side of me thinks it's not ok leaving your baby crying for so many hours. Sorry if this doesn't make sense, haven't had much sleep lately!