Ginny did stick her tongue out at Ron when he did as much to her, and then watched as he approached the basket, inspecting it nowhere near as suspiciously as he made it sound. "No, of course not," Ginny assured him with a shake of her head, watching Ron unwrap and take a bite of the sandwich. Then she carried on. "I only licked it all," she told him with a smirk, before very obviously licking the top of the muffin she was holding and then taking a bite out of it.
"You didn't tell me," Ginny said chewing, not actually all that bothered that she was talking with her mouth full. It was, after all, only Ron and Ginny hardly felt the need to make a good impression on him. "How have you been?" She clarified after swallowing and then peering into the basket, giving a small 'aha' when she spotted a thermos of tea. Picking it up, Ginny poured some in the plastic lid-slash-cup it came with giving a small wave with the thermos Ron's way as if to indicate he could have some if he found himself a vessel to drink the tea out of.