Jodie Sweetin's 2-year-old daughter could become the unfortunate centerpiece in her divorce -- TMZ has learned, Sweetin's estranged husband is gearing up for a full-on custody battle with the former "Full House" star.
We broke the story ... Sweetin filed for legal separation from Morty Coyle last month, citing irreconcilable differences -- but the kicker ... Sweetin requested full custody of their daughter.
But Coyle's not going down without a fight -- he just filed a response to Sweetin's docs, asking the judge to award him joint custody.
He also wants to block the court from awarding Sweetin spousal support.
Coyle and Sweetin had barely been married a year when they split. They were married in March 2012. Sad.