Nits (Headlice)

Hey guys, I’ve been with my partner for over a year now, we’re both 17.

We’ve been sleeping at his house in an air bed than is mine, using my bedding (quilt and pillows) and I’ve still managed to get headlice from his house.

He has younger siblings that must be getting them from primary school but this has been for about 5 months now, and his mom doesn’t seem to be making any effort to get rid of them.

Advice on what to do please.