Hi everyone, need some help with something...

I have 2 skids, age 7 and 10 and a 13 year old bio son.

Bio and skid7 get along just fine, she pesters him as a normal 7 year old would at times and he gets annoyed with her, but their relationship is what I would call a typical older brother/much younger sister relationship.

Skid7 doesnt like her sister very much....but knows no different.