Glad that she passed the egg, but breaking inside probably is a sign that she had been egg bound and may be needed more calcium to help pass it. There can be a chance of infection when an egg breaks inside. Some use antibiotics, while some don’t. I would continue to give her some human calcium for a few days. Tums or 1/2 calcium tablet with vitamin D is good. I would offer some cooked egg to her and wet chicken feed in a small bowl. She may feel better now unless she has another egg coming along.