Tavia Serena Cannon filed a Complaint for Support in PA last week, she claims she had a child with Eric in October 2011. Cannon says she makes $300/week babysitting and wants Williams to fork over some cash and medical coverage for the kid.
Here's the rub ... at the time the baby was allegedly conceived -- Jan/Feb 2011 -- the former NBAer was still married to Jennifer ... who didn't file for divorce until June 2011.
Sources close to Jennifer tell TMZ this news comes as a shock. They claim the "BB Wife" had NO CLUE about the child. Their divorce is still pending in a NJ court.
Calls to Eric's rep have not been returned.