Sandra: The argument

Sarah stormed into May's kitchen and dropped her empty coffee mug into the sink, causing it to shatter into a thousand pieces.  May startled by the noise left her ironing and  went to investigate.
'Oh Sarah', she exclaimed 'Not another one of my poppy mugs. That's the second one this week'.
'Yes well, it wasn't me that broke the first one was it?' Sarah glared at May.
'If you do not want me here you just have to say the word and I will go. No doubt Mum and Carl will put me up in exchange for me cleaning up their mess!  You can live here happily with your poppy mugs and your brass ornaments and those two stupid old men'.
'Sarah', May clearly shaken by the outburst looked at her grandaughter. 'What on earth has got into you?'
May walked towards Sarah intending to give her a hug but Sarah turned her back on her.  Sarah's shouders were visibly shaking and May knew she was crying.
'Sarah', she said more gently this time. 'Just tell me whats wrong. Why are you so upset and angry with me?'
Sarah flashed her eyes at her Gran, 'You are such a fraud,' she  shouted 'Making out you care about everyone when really the only person you care about is yourself.  I am sick and tired of living in a house full of geriatrics.  One of whom has been in my room again by the way'
'I told you to keep your door locked Sarah. You know I have tried telling the pair of them that they must not go into your room.  The trouble is the poor dears forget what has been said five minutes after they have been told. What's missing this time'?
'It doesn't matter whats missing does it? They have no business being in there at all'. Sarah replied.
May was beginning to lose patience with Sarah. 'Just tell me what's missing and I will search their rooms for it.  If I can't find it I will replace it'.
'I told you Gran, it doesn't matter. just forget it' Sarah picked up her coat from where she had flung it earlier 'I am going for a walk, I will see you later'.
May sighed and shook her head. 'Teenage girls, all that passion, all those hormones'. She found some newspaper and cleared up the remains of the mug, then returned wearily to her ironing.

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May is unaware that the missing item from Sarah's room is a pregnancy test kit. Sarah loves May dearly and does not know how to tell her that she might be pregnant. She hits out at May but is really angry with herself for getting into this predicament.