Is it normal to use food to pleasure yourself?

While I'm away at work, my girlfriend watches porn and drinks Pinot grigio all night. By the time I get home she is very worked up and horny. It's very hot. I end up giving it to her as soon as I walk through the door. She always has an orgasm. But after 20 minutes or so, she gets all worked up and horny again. I'm usually in the shower when this happens. When I come out of the bathroom she will be on the living room couch, watching porn, and masturbating with a banana or zuchinni! She doesn't mind I see her. In fact, she wants to use the fruit on (in) me! I'm extremely turned off by this, especially since it's our groceries and were on such a tight budget! To make matters worse, she never cleans the house, nor herself somedays. I can't take this anymore! I've been eating ramen because I can't afford to eat decent food in Alaska with her strange sex fetish.