A lot of young women were in and out of London, Bath, Brighton, resorts, etc. from other places for visits. Willoughby had the ability to talk women of Eliza’s and Marianne’s ilk for a ‘quick ride‘ in his carriage and such who would see themselves as doing nothing wrong and unfortunately might find themselves having been seduced. They would be dropped off where they are staying, and, unless a pregnancy resulted, go back to their permanent residences no one the wiser.

Sorry but I just can't agree with this. I can't see that this behavior would not get out, even if it only happened occasionally, or that soem genteel girls would keep this dark. An upper class girl who had lost her virtue would be afraid that she could not marry. She would hardly just "go home and say nothing".. She would in any case not have that many opportunities for such sneaking around. It was only in a special case where Eliza Williams and her freind werent being looked after, and her friend was a very unpleasant piece of work who not only covered for her but wouldn't tell waht she knew when Eliza disappeared. I simply can't see Will goign to such trouble anyway just to get a woman into his bed, he might enjoy a challenge but such behaviour would be far too great a risk for him when there were plenty of lower class girls or upper class married women he could seduce. And with Marianne, he was hardly going to try to seduce an upper class girl living within a few miles of his prudish and moralistic cousin's house.
HOwever I think Im done with this discussion...