Why not tell her now? Honesty is a good thing, especially if you're 'in love' with her.
If she doesn't like it, then you could always go the local Wal-Mart and annnounce "Attention Shoppers, I sell porn on the internet, and I'm looking for a girlfriend. Please make your way to customer service if interested in hooking up." This is a win-win situation because there's almost always a line at customer service, so they'll be lined up before you start.
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FreeNetPass Steve
Protecting your site with FreeNetPass is like eating Fruity Pebbles naked in the afternoon... except we pay you $15