How does Nelly respond to the encounter between Catherine and Heathcliff in Chapter 22?

Nelly breaks the lock and escorts Cathy away, while Heathcliff tempts her to visit. It begins to rain, and during the walk home Cathy is quiet. Nelly knows that Heathcliff had made her feel guilty and concerned for not visiting. Once at home, Cathy cries and makes Nelly promise to go with her to the Heights tomorrow.