I just wanted to get a general idea on people’s thoughts on this. I have a 4 yr old and a 10 month old. Since my mum sometimes take them in her car I have always bought additional car seats so we don’t have to mess on getting in and out car etc (I should avoid heavy lifting for medical reasons) My mum also has my niece who is 5 a lot who she doesn’t have an additional car seat so therefore they use my 4 yr olds as they’re same size. Now I have no problem with her using it but when it comes to them taking my 4yr old and my niece out together I’m the one scrambling around in the car “lifting” car seat in and out as my niece is using my sons. I am a stay at home mum on one income while my brother and wife both earn high wage so why not get their own considering my mum has her every week or at least get theirs out the car and save me the hassle! Or am I just being petty?