Dad's dull mate, Geoff, is here. He's talking about his socket set. Apparently it's a thirty-seven Piece, drop-forged, heat-treated, chrome vanadium socket set with black oxide finish. Dad is rubbing his left earlobe. This is a signal. One of us is now meant to call his mobile phone. Gran has taken it upon herself to make that call.

Dad: Hello?
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.