My experience tells me I wouldn’t be so quite cavalier however I’d do everything you can to limit the transmission. I’m assuming after your contact you’ll isolate for the necessary time?
Make sure you keep the fluids in your mum and get her to eat even if she starts to feel poorly. My main issue was exhaustion in part brought on by zero food intake for 4 days. The psychological aspect was another issue for me and some reassurance would also help