Need opions about IBC with tumor

I am looking for some opinions. On Feb 4th my mother had a mastectomy. Friday of last week she saw the surgeon who said he found cancer in three of the five lymph nodes. She had an appointment today that she canceled to remove the drain. She said it was still draining too much. This morning she admitted she had symptoms that she had previously not discussed with us. She said she had redness around the breast before the surgery, the nipple changed color rapidly and became white and the breast was warm to the touch. She said the nipple changed and shriveled between the mammogram and the appointment with the surgeon. However- they removed a 4.5 cm lump. One problem is that she does not listen to details when she visits the doctor. She appears to have all the symptoms of the rapidly changing breast with the redness, the warmth and the nipple changes- but then she had the lump which appears inconsistent. I called the surgeon today and asked him if she had IBC and he acted surprised and said " why did your mother say that?"  Do we think she has a regular tumor stage IIB with breast changes or does she have undiagnosed IBC with a rare tumor? I would just like some opinions

Thanks ( number two of five children who's mother was just diagnosed and treated)