"chase down rich men"
I can't answer that, but when responding in comment, I saw where my question had come up..reporting that a person in the presence of Onassis said he did not show any sign of surprise at the news event of the shooting, and said {as how can we really know what another is thinking] that he already seemed aware.
She was close to Joe as would leave the others and go sit at his knee after his stroke. He would be the first she would visit upon her return to the Cape Cod home.
She did not have to chase down rich men. Onassis she had met thought the circle of friends of her sister. When not in Italy she was beside her husband. JFK and his brothers had the issue of "chasing" anything in a skirt. As in the one you marry to raise the family, and the one you don't bring home and hope no one finds out about.
My cousin tells me stories about his side of the family now deceased lived on Beacon Hill, neighbors, best friends in that social circle. Even becoming part of the Rockefeller family..all intertwined.
I always felt that JFK’s murder had the whiff of international intrigue to it...and Onassis was so well connected. Don’t forget about his long-time mistress, Maria Callas, who died well before her time. Money does not necessarily equate with class.