Is anyone else disturbed by the Norwich Union advert, the one with the grandmother and the cup of tea?

Basically Gran is going to take her grandson a cup of tea but when she gets to his door she hears him shout out “Yes! Yes! I Love You!” passionately so Gran decides not to interrupt and goes back down stairs and says he’s just like his Grandad. But wait a minute Gran has not seen anyone else come into the house, nor has she herd anyone else crying out in passion. Are we to assume that Grandad used to spend a lot of time on his own locked in his bedroom nosily knocking one off the wrist!