It's going to be interesting to find out who next finds out about Robron. I really hope it's Adam.
Aaron's going to feel guilty about having to keep Vanessa/Adam's ONS behind Victoria's back. Adam would be angry because he'll then think the investment from Robert was a ploy for Robron seeing each other (which it is really). That would be a really intriguing dynamic, and if they do have a big fallout, Victoria would then get suspicious as she knows it wouldn't be about the business but something else.
Btw, I know the characters on ED have some sort of partial deafness when something's happening right next to them, but how on earth does Rhona not know what's going on? She was right there when Paddy/Chas were chatting about Robert & saw the three of them go into the back room. And the other day when Robert raised his pint to Paddy, she could quite clearly see Paddy was annoyed & she didn't say anything!