I have no kids so we lived large. Our friends all have kids. Some have paid for drug rehab as much as 9 times without success. They pay for bail and lawyers. Others support their kids when they lose their jobs and have limited job skills which prevent them from finding work that pays enough to support their family.
For some we know it greatly disrupted their retirement. For others who saved a lot, they just postponed a cruise or new car. It will depending on your assets how it will affect your retirement.