so you hadn't bugged the wind direction on the DI in advance when the instructor wasn't looking.
As if.....
Well, I
think I got away with it on my last flight ... I turned a corner, she asked me whether I thought I was downwind or base leg, I told her, she asked me which direction I was going to land in, I replied "into wind as per the DI bug". She didn't say anything else. I'm sure that conversation wouldn't have been necessary if she'd spotted me setting it