That is indeed true, but at the same time, let's not forget that HB essentially bribed Reva into marrying him as he saw she was getting too close to Josh and he wanted her for himself. In saying that though, I believe HB is the only Lewis that accepted Reva for whom she truly was as a person (flaws and all) and did not judge her like everyone else did.
Also, the impression I got from the late '83/early '84 stuff with Reva was that her character was intended to be a caricature more than anything else, however she gained so much popularity with the audience (not in the least due to Kim Zimmer's amazing work in bringing Reva alive) that the writers started to flesh out her character and past with the Lewises a lot more. There is one awesome scene from the Valentine's Day Masquerade Ball in Feb '84 where Reva and Vanessa teamed up to lock Billy's date away in the storage cupboard. I personally got a kick from watching that, and later observed a number of really heartfelt scenes between those two, particularly when Vanessa was starting to drift away from Billy due to his obsession with getting rid of Reva.
Did Reva and Vanessa interact much together after that initial period of '84/'85?