I'm desperate to get this section more active, as I've still got the feeling I still haven't figured the series quite out, especially the characters.
For instance, the relationship between Davina and Veronica gets rather complicated, although it might not seem so. I think it's all based on jealousy: Veronica envies her sister because she's (according to her own saying) the one with the better looks, and the one who gets the attention, even from Roger. (who wants to ''runs his fingers up and down his wife's sister'', haha) Only later on I realised she is also very jealous, because her sister did what she never dared to: cheat on her husband. She seems to think that Davina's life is perfect: good looking, attention getting, free... What she doesn't seem to get is that Davina is actually a widow, not quite knowing what to do with her life and regretting many things.
It's interesting how one can tell her character by the very few things she says. Credits for Joanna's acting here: her body language and expressions make so much clear.