The best thing you could do at the moment that doesn't require fancy altar items such as candles and incense is either doing a distance or close energy healing or making a charm bag. All you need for the charm bag is a small pocket bag(can be of the color green, white or if you don't have the time, any color) and fill it with herbs of healing, crystals if you can, powerful symbols of healing(sigils or reiki symbols) and blessed water(you can experiment with what you put into it). The important part is that all the tools are charged for their purpose of healing and that the little bag is sealed and not opened. Then store it somewhere around your mother. Maybe her purse(if it's close to her), under her bed or even let her hold/wear it if she's open to the idea of a lucky charm.