I need help. Mum, in her mid 60s, has asked for a nightie. She normally wears oversized tshirt style and is around a size 26. She won't have cotton as there's no 'give' but I doubt she's ever tried. She says things are usually too tight on the tops of her arms so I need something with plenty of room. She doesn't leave the house so I can't get her to look at anything and she is resistant to change. She's also a hoarder so she won't say if it's not right she'll just carry on with the holey ones she's got. Does anyone have a suggestion? I looked at m&s but their sizes are very limited at 26-28. I have a primark in town but I don't know if they go up that far. I am not bothered about price/quality as long as she will wear it!