I turn the key slowly in the front door, ignoring the pounding of my heart as I push it open. Silence comes from inside and I breathe out a sigh of relief before stepping inside. I don't dare slow down and risk Mum or Trevor spotting me in last night's clothes. I make a beeline for the stairs, taking them two at a time.

"Emily? Is that you?" Mum's voice fills the air and I ignore her, pushing through my bedroom door and locking it behind me. I hear her walking up the stairs, her voice lined with confusion.

"Emily? What are you doing?"

I quickly tear off my clothes,...