All good advice above.
As a pp has already said, your DM should be assessed by an OT or physio prior to admission to check the height of her furniture including her bed and toilet, so that equipment can be provided to ensure that she will be safe at home on discharge.
A grabber is great, and if she’s not issued with one, a long handled shoehorn is essential. You can also purchase something called a SOXON, which helps with putting socks on. Skirts are easier than trousers in the early days, but avoid tights (too difficult to get on).
If she lives alone a trolley table can be helpful to bring meals from the kitchen to the dining table. A thermos mug is also a great help to bring hot drinks from the kitchen (she can carry it through in a cross shoulder bag whilst she’s still using crutches).
Once home, she’ll need encouragement to continue with the exercises provided by the physios on the ward. Patients often forget about the need to get their confidence back walking outside, so that’s always a good thing to do when you visit - perhaps a short walk up the drive, or a few doors down the road is all it takes.
A hip replacement is a life changing operation - all the best to your DM.