Charlie and Claire were still in the car, and they were still some distance away from the group of people. So, they could not hear exactly what they were talking about.
However, by the looks of it, it was obvious that Matilda must have asked her son, Paul, to help her prepare a gift for Jacob in exchange.
Claire felt even more depressed when she saw both of them exchanging gifts with one another. “Just look at Dad and Aunt Hall! Both of them are obviously acting more than just ordinary friends