Why does Elisenda let out a sigh of relief “for herself and for him“?

Elisenda let out a sigh of relief because the angel hadn't hurt himself (or her property), and because he was finally out of her way.

Elisenda let out a sigh of relief, for herself and for him, when she watched him pass over the last houses, holding himself up in some way with the risky flapping of a senile vulture. She kept watching him even when she was through cutting the onions and she kept on watching until it was no longer possible for her to see him, because then he was no longer an annoyance in her life but an imaginary dot on the horizon of the sea.