- Sharon Osbourne's son Jack and his fiancée Lisa Stelly are expecting a baby in April
- "I'm getting more and more excited," Osbourne told People
- "I am going to be the grandmother from hell," she said
() -- Sharon Osbourne has never been known to hold back -- and she certainly won't start when her first grandchild arrives later this year.
With son Jack and his fiancée Lisa Stelly , the giddy grandmother-to-be is already counting down the days.
"It just gets better and better, the thought of it, as we're getting ," Osbourne, 59, told PEOPLE at Guitar World's Rock & Roll Roast in Anaheim, California on Thursday. "I'm getting more and more excited."
Holding off on buying for baby until the big debut -- "I'm very superstitious," she reveals -- Osbourne isn't shy about sharing her future intentions!
"I am going to be the grandmother from hell because I am so bad," she says. "My son and Lisa are going to be like, 'Get her out of here!'"
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