'But how did she know it was you?' Lavender asked.

[Answer to a Pictures, Poetry and Prose prompt; pick a book and open it at page 100, choose a random sentence and write using it.]

'Matilda' by Roald Dahl, page 100.

"'But how did she know it was you?' Lavender asked."
She had been listening to me very attentively, carefully, in order to understand every single word I said, assimilating very accurately the story I was telling her.
'She didn't, Ben told her' I answered.
'Why?' She asked me.
'Well, because I had stolen his bike... That was just a kids fight, it got worse later...'
She had to choose between her big amount of questions the most harmless, given that she knew this was a dangerous topic to talk to me about, for I was still so susceptible about that.
'Is that why you and my husband don't talk to each other anymore?' she asked me, trying to sound calm but with evident interest.
'Well, that's what started it, but we could call it that way, if you want to' I answered, feeling a bit guilty.
'You know, your mum is very sad because of this, not beeing able to see you at the same time, for this stupid brother-sister fight...' she started, testing my mood.
'I know, she has told me so, but, what can I do? Everytime I try to talk to Ben he just turns around and walks away, he's so stubborn!' I couldn't believe I was telling this story to my sister-in-law, it just sounded too awkward.
'That's where I can help you, you know I'm the only person he truly listens to. I could talk to him, I could tell him you're sorry for whichever bad thing you've done to him, and that you agree to talk to him calmly and without trying to fight... Only if that's what you really are gonna do, do you understand?' she was still testing my answers and possible sudden mood shifts.
'Well, I agree, just don't let him know it wasn't my idea, it's just family pride...'
'As you wish, my dear friend.' And away she went, coming back two hours later with her husband, my brother Ben.
I smiled timidly at him when I saw him, he smiled back, widely. That way I knew everything was forgiven.