Kordell Stewart — Playdate w/ Baby Mama Hours Before Divorce

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The night before Kordell Stewart filed for divorce from his wife Porsha Williams, he was hanging out with another woman — his baby mama — and our sources has the pic.

Kordell — a former NFL star who spent years with the Pittsburgh Steelers — spent Thursday March 21 at Dave & Busters video game arcade restaurant in Marietta, Georgia with former flame Tania Richardson and their son Syre.

Sources close to Kordell tell our sources … Stewart was initially booked to appear at the restaurant as part of an event for a local radio station where he works … but thought Syre would enjoy the place, so he called up Tania and invited them over.

It”s unclear if Kordell and Tania talked about the NFL player”s marriage … but witnesses inside the joint tell us the two appeared to be having a serious conversation and Kordell looked stressed out.

We broke the story … Kordell filed for divorce the very next day — and Williams (who stars on “Real Housewives of Atlanta”) claims she was blindsided by Stewart”s actions.

The two were married in 2011 — and have no children of their own.