The 'Fashion Police' star has been spoiling her brother Jack's nine-month-old daughter so much that he has asked her not to buy the tot anything new over the holidays, reported Contactmusic.
"I promised Jack I wouldn't spoil her so I have to run everything past him. We'll see how long that lasts," she said.
Osbourne, 28, also said that her brother has matured into a loving husband to model wife Lisa as well as a doting father.
"Nothing makes me more proud of Jack. I feel like I've watched my little baby brother turn into a man overnight. I've always been very protective of him but his wife Lisa is the first girl he's dated where I've been like, 'Oh my God, I love you.' And we're a bigger family now. What could be better?," she added.