Riddler nearly makes a comment about it. Nearly points out that Oswald had chances to say something, that there was the times between.

Ed stops him. Oswald will take it badly and no one will get anything nice and then Riddler will take it out on Ed.

Riddler pushes his hand up into Oswald's sleep mussed hair and tips his head so that he can kiss him, teasing it at first with brushes and hints of teeth before pressing close and deep, like he could taste Oswald's want if he just kissed firm enough.