He didn't need the force, even if he was a little slow to realize that was what it was, to tell him something was going on. Padme's posture, the change in tones was enough, though he could feel something change in Obi-wan though he wasn't trained to a point where he could understand what it was. Anakin preferred things to be straightforward and clear-cut, so the little complication got his eyebrows shooting up.
Obi was lucky that he felt the unease, if he hadn't he likely would have 'meowed' at the Jedi, just to torment him. "Oh let's not get all awkward and uncomfortable on my account without telling me why." he tilted his head, looking past Padme. "It is a pretty clock though."