Yes, it is an apology.

Irene.

Followed by an entreaty that Mrs. Renshaw will permit Mrs. Stonehay to call at the Villa Colobiano immediately to make peace in person.

[Wilfrid and Janet go down into the garden.]

Leslie.

You know the letter almost word for word.

Irene.

I know my mother better day by day. Leslie, you don’t see what that means?

Leslie.

That your mother is sorry.