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GAS!!!!!
Test her theory I say. There's a few tactics availble.
My favourite is buy the Squier version. Let her see the receipt. Return it and upgrade in the same colour.
Second favourite is tell her your mate loaned it he has your blue one.
'What blue one?'
'You know, the blue one. Four strings. White bit on it. Two buttons.'
'Er, yeah, I think so'
'Good girl. Now fuck off out of my studio I'm laying down a rhythm track'.