Major plot hole...(snicker spoiler)

It's called don't let him in but at the start Mandy has already let Tristan in the night before. He was in like Flynn! Show me that plot hole Mandy, oh you are naughty Tristan. Shut up Mandy said the total prat, you must be a complete bimbo to have slept with me. Well I am a plot HO, then why don't you ever show us your tits? Just then the phone rang, it was her brother, tell me what you're wearing he said...

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Scientologists love Narnia, there's plenty of closet space.