My broody chicken has disappeared.......?

This is my first year of keeping chickens.Despite a large hen house, with nesting boxes, they all like to lay on the same nest. They are in an enclosure during the morning and free range in the afternoon. About 10 days ago,"Molly" went broody and stayed on the nest all day and night, and the others vertually stopped laying. I offered her food and water in situ, but she didnt take it so after a week I got worried and when I fed them in the morning, I turfed her off and removed the eggs. She protested, but tucked eagerly into food and did the hugest poo ever, so had obviously been holding on. She then returned to the nest. Since I dont have a erel, I felt this routine was in her best interest. However, this evening, when all the others went to bed at 7.30pm, Molly had disappeared. I searched the garden and all the woods around us but cant find her. Do you think a fox may have come into the hen house during the day and taken her, or do you think she has nested somewhere outdoors.