"Parents can't do everything for their children as it only increases their disability and reliance on others." Is it correct?
Is this your own sentence? If not, in what context did you read it?
This is my sentence. 'Parents can't do everything for their children as it only increases children's disability.' That's all I can come up with.
You need to go and check on the definition of "disability". It's a very specific term when applied to people and you are using it inappropriately here. Apart from anything else, with your use of "increasing children's disability", you are suggesting that they are disabled in the first place and the parents' behaviour is somehow making that disability worse. Unless you are actually writing a piece about disabled children (ie children with a physical or mental incapacity or impairment), don't use the word "disability".
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.