Harley has done this bit far too many times in her lifetime. But Thor is no Joker... so there is at least that difference. Which is enough for her.

She decides on a mushroom and spinach omelette, something that won't upset his stomach, if he hasn't eaten in a long period of time.

And if she is aware that technically she wasn't invited in... she doesn't seem to be bothered by the fact.

"Not just mead anymore. I brought orange juice, freshly squeezed." Harley gives him another bright smile. "I dropped off the majority of the supplies with the nice lady at the grocer. For the village."