ovulation maybe ?

[Alicia]

1.0 signifies one male so, no, I'm forced to tell you that he is not ovulating . . . Sorry, I had to

Kidding aside, no. She is not obviously ovulating. She may be close (say, within a week or two or a few days, sometimes it's hard to tell) if the swelling seems sudden and different. Or not. Honestly, it's hard to say.

Ovulation isn't just a swelling -- which can be darn dramatic -- the snake also takes on a very characteristic posture as she moves her follicles from her ovaries to oviducts and usually will not have any part of her body rotated or elevated. I can't say it never happens, only that it seems very uncommon. She will look like she's concentrating hard on what she's doing, because she is.