"Yeah, all right. I'm sure you need to get back to your cooking," he agrees.

Which is a good enough excuse, if Soldat wants to take it. There will be plenty of time for Law to meet everyone, but that can wait until after they've had time to catch up, first. More than just them and Mary and it starts to become a really awkward room party that he's not interested in having right now. Or really ever. Unless Law has changed substantially, neither of them much enjoy being in a large group unless it's necessary.