It’s been mentioned in several books about JFK and his family. Not sure if her exact name was given, but there is more than enough detail to figure out who she was if anyone cared.
If if you have read any of the objective, factual books about the ‘clan’, this is the least surprising story ever printed. Joe Senior, Joe Junior, and JFK passed women around like they were baseball cards. Bobby eventually grew up enough to join the fun. Teddy was too young at the time, although he would follow the family lead later in life.
Why they are treated as though they somehow ‘championed’ women’s causes is one of our greatest fictions. You have to wait till the “bent one” arrives to find a politician with a more callous disregard for women.
They love abortion and sexual liberty. Necessity is the mother of invention.