I have a 2010 female Spider I bought about a month ago. She was around 1300g when I bought her and is just over 1600g now.

The breeder told me she was a virgin and had not ever been paired when I bought her. She has not been paired with any males here. I am just confused by some of her behavior.

For the past two weeks she has only been seeking the cool side of her enclosure. Literally refuses to ever sit on the heat. (warm side is around 90 degrees, cool side around 75). Also, I often find her sitting in a perfect coil, as a female would coil on eggs. She has eaten like a MONSTER since she got here... Hence the 300g weight gain in just over a month... She just seems to be showing some behavior that a breeding/building female might show, yet she has not been bred. The breeder assured me again that she had never been paired. I am saving her for a male that is not ready to breed yet, so wasn't going to breed her at all this year. Ideas on why a female would be acting this way that hasn't been bred?