Your hedgehog will get use to the routine of bonding with you when your there Monday - Thursday and then your mum when your not there Friday - Sunday depending on what time you do bonding and get back of course.
With the bonding process I'd just make sure you put both yours and your mums scent in the enclosure so that from the start the hedgie gets used to both scents.
He/she will just bond to the both of you, and adapt to your routine. As long as your mum is happy to do that and clean the wheel and poo, change food and water and feed the insects, I can't see it being a problem.
Last edited by Ria; 07-07-2019 at 08:29 AM.