Whose responsibility is it to fund your child’s college education?

H and I believed we should pay for college for his kids and ours, which is what we did. Both of us have gone far beyond our parents in terms of economic status and it was due to the fact that we got college/graduate degrees. As such, we both value education and were lucky enough to be able to cover the costs for all four kids to attend and graduate from college (all private schools). I’m really surprised at how much the cost of tuition at private colleges has increased in recent years. My oldest D (in her early 30s) graduated from Tufts–tuition was about $25-27K. I just looked up Tufts tuition for 2018-2019–$50K.