It's not normal. It's probably not very serious, but she should see her doctor for evaluation. Most likely it's just some poor healing on the inside. However, the incision might need to be opened a little to allow more drainage. Then further management of the incision would help it to heal well. And there may be an infection in the incision that could require antibiotics.
As far as the baby's umbilical stump, you should also take the baby to see the baby's doctor. Redness suggests infection, and antibiotics might be needed. It's also not normal, at least if it's more than just very slight redness. Best wishes.
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