he was definitely eating her snacks!

I loved that. "Hmmm, I think I've throttled her enough now. Have fun, Charles. Oh hey, look, caviar!"

As for the champagne: the first two times I saw the film, I didn't look closely and I thought Charles was getting himself a bottle of beer. That would've needed no explanation, so I'm intrigued by the fact that really there's something much odder going on. It's like the filmmakers want us to imagine slash! (The actors certainly seem to.)