At what age should your child bathe themselves and stop bathing with you

Ok so my daughter turned 5 in January, she doesn’t shower with me anymore but every time she’s with my mil she showers with her and it’s just wrong in my opinion for someone other than the child’s same sex parents to bathe with them at that age and even needs to stop doing that at a certain age. I told my daughter today she needs to start trying to bathe herself cause she’s gonna end up having to soon and she was like no daddy always gives me my baths and I said baby once you get bigger and get girl parts daddy can’t help you any more and she said “well he helps you sometimes when baby’s hurting you” 🤦🏻‍♀️ lmao anyways it got me thinking what age do you quite and is it different for different sex children I only have a girl and don’t know what baby #2 will be