I had two spoiled rotten dogs that slept in the bed with me when I started cleansing. I didn't let it stop me. And they kept sleeping with me. You'd have to live in a sterile bubble to avoid recontamination. Eggs are everywhere. You will have to do routine maintenence the rest of your life, anyway. Just keep the door to your room shut and don't let the cat get in your face. You can reduce your worm population significantly and feel a whole lot better, even with animals in the house. I put diatamaceous earth in my dogs food. They didn't like it very much. But I think it was good for them. Does your mom worm the cat regularly? Maybe you could buy a cat wormer and give it to the cat when you Mom isn't looking.