Same here. Went from DINKs to dual income with kid to me being the main (by a large margin) earner. Wife does tax accounting from home and that mostly goes to pay for private education. Two more years kid goes to university.
I have a 16, 14, and 11 year old to get through college. Hence my 10 year more until retirement.
That is what I get for marrying a 2nd time to a women 14 years younger than me....LMAO