I can almost get Pat becoming enthralled by Rob or at least happy that someone else is looking after Helen.
However, I can't believe that Shula, Kenton, Jennifer and David who have all seen the horrid side of Rob could all be quite so ready to now believe him to be the most lovely person.
I'm not sure why they started the culvert/saboteur storylines if they just don't really finish them. In a village those people would have gossiped with each other and Tom would surely be bitching about his bil trying to muscle in on the family business.
Also in any normal family - Pat would have had a quiet word about how Helen and Rob were managing for money since he left his job.