The wolf takes the pigs back to his house and pigs are shaking and quivering and fear. They do not know what is going to happen, but the wolf sees that and feels sorry for them and something changes in his mind.
The wolf brings them to a room and says "This is where u will be sleeping tonight, if you are hungry there is food on the table". The pigs were shocked, why was he giving them food and letting them sleep instead of just eating them and getting it over with?
The wolf explains that he was never trying to hurt them. He was trying to ask them how to switch to being a vegetarian because his doctor says he needs to go on a diet. The Wolf takes them in as his sons and they live happily ever after as a family.