past incursive

During a conversation with Colleen and Sasha I hear the word “sisters”. We’re talking about the Von Grey Band but what pops into my head is the time I kissed my girlfriend’s sister at a party. This is followed immediately by my girlfriend’s reaction and my own feelings of regret. Now I’m asking myself: Do Colleen and Sasha somehow know about this? That can’t be ..it happened too long ago! Yet, I’m moved by an urge to confess this shameful act and redeem myself. I resist but end up missing the rest of the conversation. “You okay?” Sasha asks.