A hairnet, or sometimes simply a net or caul, is a small, usually elasticised, light net wore over long hair to keep it in place. It is used to keep hair restrained. Hairnets are part of standard attire for female horse riders and are used in most equestrian orders, including dressage, eventing, show jumping, and hunting.
While taking tea, Mrs. Fitzgerald tells Mrs. Pearson her fortune with the help of cards. According to her, Mrs. Pearson’s problem is that she is excessively fond of her husband and children.