That is not to say that any small white lie he tells means he's having an affair or is prone to one again, or that he's a bad guy with no character. As the betrayed spouse, I will be more sensitive to these small infractions and I have learned they can be triggers that upset me. I can't stand watching a show where someone is lying to another, even about something small. It just sends me back to the big lie that devastated me.
But back to you. I guess I don't feel I fully understand your situation well enough, nor this specific incident, to give input on whether you are reading too much into it . . . so I won't. I guess I'm just mentioning that its possible you are being overly sensitive because of what you've been through. And with good reason.
But it wouldve been nice if it were true! Such a little gesture can have such sweet sentiment - and yet it was a lie. Grand gestures are nice but sometimes feel contrived (not that I don't appreciate them!) but it's the little things put together that carry the most weight. And he obviously knew that or he wouldn't have lied about it - so why couldn't he have just done it? Even if he said, " I watched the first episode but regretted it because you weren't with me to enjoy it" would have carried meaning without sullying it with a lie.