One more kiss - no, really - and Steve let her go, starting to move to the island before turning back to Rogue with a confused, slightly sheepish look on his face. "Should─ do I need to show you where anything is?" Or have you already looked around and know where it is? was heavily implied, though only teasingly. He'd known as soon as he'd shown her the kitchen that it was going to be Rogue's domain when she was at his place; her buying food she could cook with just reinforced the notion.

The only problem he had with Rogue buying food was, well, spending her money on something for his apartment. Something that was going to be there, being used by him, even when she wasn't.

Clearly, the only way to remedy that was to get her to eat as much as possible before she went home.