Simon Monjack reportedly had two secret children at the time of his death.
The British screenwriter – who was found dead last month just five months after wife Brittany Murphy died – is said to have hidden the existence of the kids from two previous relationships and allegedly owed both mothers child support.
According to website TMZ, Simon’s family – including his brother, mother and therapist – discovered emails requesting money on his laptop after staying with Brittany’s mother Sharon last week.
The documents on the computer claim he had a son from one woman and a daughter from another.
Evidence of money transfers were also found showing Simon sent $48,000 to his lawyer and other amounts overseas.
The screenwriter’s family have now passed the computer on to investigators, while his mother-in-law has filed a theft report with police after the laptop went missing.
Following his death, Simon – who had claimed he and the actress were ready to try for a family right before she died – was laid to rest next to his late wife.
Family spokesman Roger Neal said: “It was his wish to be laid to rest next to her.”
Murphy died in December at the age of 32.