With nothing left to hide ... Morena Baccarin and Benjamin McKenzie are getting kinda touchy on the NYC set of "Gotham."
Even when cameras weren't rolling Thursday, Ben slipped in a little PDA with his baby mama.
Morena was wearing a baggy coat and scarf as they waited to shoot a scene ... so it doesn't look like they're working the pregnancy into a "Gotham" plotline.
As we've reported ... the co-stars plan to get married in the future ... once she can wrap up her nasty divorce.
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