Parents are increasingly supporting their children well into their adulthoods and often serve as safety nets during periods of economic and marital instability. Improving life expectancies and health allow parents to provide for their children longer but greater union dissolution among parents can weaken the safety nets that they can create for their adult children. Greater mortality, non-marital childbearing, and divorce among lower socioeconomic (SES) families may be reinforcing inequalities across generations. This article examines two cohorts aged 25-49 from the 1988 (n = 7,246) and the 2013 (n = 7,014) Panel Study of Income Dynamics Roster and Transfers Files. Adults with college degrees had two surviving parents who are living together for 1.8 years longer than non-graduates in 1988. This disparity increased by five years to 6.8 years in 2013. This increase in disparity is driven predominantly by higher rates of union dissolution among parents of adults with less education. Growing differences in paternal mortality also contributed to the rise in inequality.