For a while now I'm thinking of stealing from my dad's pocket
That may be a bad idea. Why are you going to steal from your dad?
I need more money
It is not ok to steal money from your dad. If you need more money, you need to earn it by respectable means.
I was hoping you wouldn't notice.
Don't you think it's a good thing that I did notice? Stealing from your dad can make him lose a lot of trust for you, don't you want to have a good relationship with him? How about just asking for the money and see what kind of work you can do for him?