Gran: Hello. It's me.
Dad looks confused at this point. Gran wasn't meant to start a conversation. She's merely required to make his phone ring so that he can extricate himself from Geoff's boring company.
Dad: A-hem. Why are you calling? You're sitting opposite me.
Gran: I saw you rubbing your left earlobe.
Dad: Oh for god's sake! Just put the phone down.
Gran: But aren't you bored?
Dad: Please. Just put the phone down!
Gran: Well, if you insist.
Geoff looks bemused. He couldn't have suspected anything though as he's now talking about hedge trimmers. Gran is shit at this kind of thing.