Jill Biden was never the teenage babysitter, so just stop that FAKE news. "1974 that Stevenson became suspicious that his wife was engaged in an affair with Joe. One clue was that she declined to go to a Bruce Springsteen concert with him, saying, “Joe has asked me to keep an eye on the boys.” Eventually, he learned that Joe had been driving with Jill in her Corvette and confronted her about it. The two divorced in 1975. Not quite the fairytale love story with which Biden likes to regale his constituents."
https://patriotpost.us/articles/73668-joe-and-jill-bidens-not-so-fairytale-love-story-2020-09-24
I went on a deep dive on this woman and she had something to do with working on the shores of markets where Biden might have frequented, but I couldn't verify anything, so I really do not know how she got her claws into him, but it wasn't by love at first sight.
https://en.wikipedia.org/wiki/Jill_Biden
https://patriotpost.us/articles/73668-joe-and-jill-bidens-not-so-fairytale-love-story-2020-09-24