Should we feel empathy towards Mrs. Lyons?

So, at the beginning of the play, we discover that Mrs. Lyons is unable to become pregnant herself and have a baby. We also find out that her husband, Mr. Lyons, does not want to adopt. This leaves Mrs. Lyons in a tricky situation; she is unable to have a child of her own. At this point in the story, I believe that it is right to feel sorry for Mrs. Lyons.

Mrs. Johnstone is having twins but she cannot afford to look after them both. Because of this Mrs. Johnstone gives on of her twins to Mrs. Lyons without anyone knowing. Mrs. Johnstone is promised to be able to see her child everyday whilst working at Mrs. Lyons' house.

However, as the story unfolds, Mrs. Lyons moves house, making Mrs. Johnstone unable to see her own child everyday, as she had promised. I feel that this is an almost malicious move from Mrs. Lyons. After Mrs. Lyons moves house, because she went against her own promise, I then no longer feel sympathy towards Mrs. Lyons.