Gerard had so much invested in making sure that people believed that this rigmarole with Ms McHugh was over.. previous, before, last year, over, moving on, get over it..
He tells Carmel, the counsellor , that its over, its in the past. people need to move on.
He tells Sue Heath and Flegg that it's in the past.. ( except when all hell breaks loose and he needs a covert phone)
He tells his staff.. he tells Alison this..probably NBC and EBC.. after all, they were in the office when Ms McHugh was fired for her sexual adventures with Gerard, and they were there in the office when Alison moved into the office.....probably Olivia knows it went on ... perhaps she believes its over, too.. or not..
When Constable Ash turns up at Gerards behest due to his bafflement re the whereabouts of his wife that morning, he tries out this story on him, too.. but he does a peculiar thing first. He wants his sister, Dad etc out of the room, as he says .. they don't know about anything re affairs etc. .. but this is improbable. Dad and Mum did know about Toni and Gerard as did all the staff, as Gerard made a big hoohaa about it in the office, called all the staff in, told them all about it, giving this as the reason as to why Toni was being fired..
But Gerard wants Constable Ash to believe that (a) its long in the past, and counselling is going fine, the marriage is being worked on successfully... and, (b) that no one in his family knows a darn thing about it.
Odd or what?
There is some reason why Gerard wants it publicly known that his marriage is fine. Everyone is to go along with this.. for why?? financial reasons is my guess.. He doesn't want future borrowing targets to get wind of this expensive element ( separation, divorce, child support, legal fees ) .. as a deterrent .. and.. he is laying the ground work for the eventual insurance claim.
Alternatively, he could be telling the truth to everyone except Toni..that is not an uncommon procedure .. men do fib to demanding extras... except that Alison is dead and Toni isn't...