Eat several small meals in a day
Avoid eating fresh fruits and vegetables on an empty stomach. I do eat them, but a very small amount, just to take my cravings away.
I have found canned peaches and some cooked vegetables do not bother me, but eating only a very small amount. Yogurt is a very good to put back good bacteria in the intestinal tract.
And last, but not least, my gastroenterologist gave me a pain patch. It is a sticky patch that you can cut to any size and I put it near my incision and it takes the pain away.
I have had to learn the hard way over the last 3 years, I hope that what I have learned will help your mother-in-law and anyone who is going thru this.
Take care, Lisa