I'm returning to work from Mat leave soon. Dm offered childcare on 1 week day for a few hours in the afternoon. She is the only childcare we have who drives as DMIL doesn't. We have an integrated isofix car seat in our own car so dropping off to DMIL isn't a problem.
My DM however, has her own car but doesn't have a car seat and will be picking up DS on said day for the afternoon, she has mentioned activities to do together which involves driving somewhere (obviously only once lockdown is lifted).
My question is - who should buy the car seat for her car?