Her Dad has obviously had to change his diet out of necessity due to his health, but fair play to him. Especially when you’re so ill you could just think ‘duck it’. From the bits we do see he seems to be eating well and you can tell he’s lost some timber.
He’s obviously being careful with what he eats and it seems Cath is joining him. All Becki has to do is eat the same as them and it would do her wonders. She should have taken it as an opportunity to change her diet too, they could have spurred each other on.
I also think it’s pretty selfish of her to make these ‘stations’ and ‘platters’ for the 3 of them all the time when her Dad is trying to look after himself. No doubt she’s bought him treats for Christmas as well like she does everyone.