I told my sister about stealing from her 6 years ago and she just laughed about it
Did she think you were telling the truth or lying>?
I don't think she believes me and thinks it's a joke.
You shouldn't have stolen, but it's good to confess. Make sure she takes you seriously though.
I'm going to buy her a new laptop and tell her it's from our parents as a gift.
I am glad you want to make amends. Buying a laptop can be really expensive, try not to lie who it cam from. She could just ask and find out you lied to her again.