It looks like he wants to say something at Maglor's words regarding locked cupboards, and at the same time not say them... but then there is talk of dinner and Elros perceives that as the stern talk being on hold for now and nods, his features slowly turning into a small smile.

Cooking with Maglor is fun. And they're getting dinner. He storms off to get Elros, but not before giving Maglor a quick hug (still somewhat tentative, the motion slower than if he would hug his brother, a lingering need to clarify that the touch will be friendly before establishing it). But then he is gone, quick, eager feet that can be heard to be running down the corridor for a few moments before the sound ceases as Elros concentrates on moving silently, not wanting to make it known to the adult into what direction he is headed to get to the place where Elrond is still hiding. They need to keep their secret hide-outs secret, after all.]