It was pretty well known at the time that he was dating both of them. It turned out that their views of the relationship(s) were pretty similar, except that each was biased to thinking she was #1.
I won't name them clearly. One should be obvious even so, even today, as she went on to a pretty big career -- bigger than mine -- and was open about the relationship. The other -- a lesser peer to me -- is more forgotten, except by industry old-timers.
My epiphany was that one shouldn't string along women for long periods of time, even if in the literal sense one is not being deceptive.
He wound up marrying neither of them, of course.