House Trained Dog Peeing Inside?

I have an 11 year old miniature Poodle, sometime last month, or the month before last the dog started peeing in front of the front door and in the formal living room. The front foyer is stone, the formal living room is wood. She has a doggie door which she has used for more than a year without fail.

We have since gotten rid of the rug that was in the formal living room due to the fact it was soaked in urine and had been defecated on so many times. After the rug was removed, the defecating stopped, however the frequent urinating is still going on in those two places. My father is not a fan of animals. He put up with her because she was housebroken. He is now livid, seething, furious, and has contemplated throwing her over our back fence to the coyotes. I need help. I don't know what to do. She I has been on the same food for forever. I love my dog, but I don't know why she is doing this to stop her. Anybody help?

By Dani