I live with my husband and three children with his parents. His daughter from his first marriage also lives with us. The in-laws go by car/train or fly by plane to the south or other cities in the summer every year, traveling for pleasure. But they only take their oldest with them, she is 13. They took ours for the first time 4 years ago. Two years ago we traveled with them ourselves. This year they're going again. They started fighting because they want to take only the older one again, and ours are out of the picture. We gave them conditions - take everyone, or the eldest is not going too! They took tickets only for themselves. It's annoying that children are divided into favorites!