Gravid snake or just being weird?

[FollowTheSun]

Snake is a confirmed female, about 6 years old. Bought from a small time breeder 4 years ago who said this snake was 2 at the time. I can't remember if he said she had never been bred, or if she was unsuccessful at it. I would imagine she'd be biting any male who came close to her.

She is extremely bitey, hisses on occasion, picky with food, and will fast in the winter for 3-5 months. In spite of our best efforts to make sure her large, comfortable enclosure has proper temps and humidity, her substrate is of the best quality, her food is thawed and heated to perfection, and she feels safe with our slow, careful efforts to make friends with her, she remains the grumpiest, meanest snake BP I have ever come across. So, now we just take care of her needs and leave her alone except to clean her enclosure or offer food.

This summer she has been extra hungry, showing hunger cues every 5-7 days instead of her usual every 2ish weeks. Even at 2 weeks she will sometimes refuse food normally, but not this year!
In addition this week she has been observed in an inverted position in her cool hide (when I removed it to check on her), wrapped around her water dish, and is always in the cool hide, even after eating.
But . . she is still eating well. She last shed 3.5 weeks ago.
We notice she's getting thicker at her "waist" but this could just be due to her increased appetite.

I removed her to the bathtub to clean her enclosure today of an extra large poop and got some pics while we were at it. During our photo session she struck at me three times.

What do you think?