Sebelius was born 5/15/1958. The person whose parents were 21 in 1960 is Kevin Ward, not Kathleen Sebelius.
Sebelius is a particularly obnoxious and disagreeable person. She’s been deteriorating ~ which probably explains why her mother and father didn’t have her institutionalized at the time.
Sebelius’ father is John J. Gilligan, former governor of Ohio (1971-75), who was born in 1921.
Wikipedia says 1948.