Jack Osbourne wants his mother to reconsider quitting 'America's Got Talent'.

Sharon Osbourne stepped down from the judging panel of the NBC show in solidarity with her son after accusing the network of reneging on a TV deal with him when he was diagnosed with Multiple Sclerosis (MS) but Jack is reportedly worried she will now spend all her free time at his house.

A source told The National Enquirer: ''[Jack] fears Sharon will be underfoot constantly and trying to baby him if she has more time on her hands.''

Friends are also worried that Sharon's public battle with the network will stress Jack out more, something which could make his illness worse.

The source added: ''As bad as Jack's prognosis is, Sharon's got to understand that fretting over her son can actually make matters worse.

''Doctors tell Jack that as he Battles MS, it's crucial to keep his stress level low - but that's hard in his crazy family. Sharon's stressing him out with her grandstanding play to quit the hit TV show, and he keeps telling her not to fall on her sword for his sake.''