Massive weight gain or normal growth?

I have a female normal ball that was 2400 grams the first time I weighed her (got her as a proven breeder) and that weight was taken in early November. I have been pairing her with my pinstripe male every four or so days (started mid November) and I put them together until I see a lock, and then when they finish their... erm... Funny business... I separate them. Well I weighed her about three days ago and she came out to be 2903 grams. She didn't eat for about two weeks when I started pairing but started to eat again a few weeks ago and has eaten every 7 days on a large rat. Is this a breeding related weight gain or is it normal growth? She doesn't look a whole lot bigger in girth but she's normally a really chunky girl. She also is going to end a shed cycle here in the next week. She's six years old, and exactly four feet long. I'm sure she's also holding in a MASSIVE dump so that might change after she sheds. Any opinions would be great. I'd get some new pictures but as stated, she's in DEEP shed ATM. Thank you guys for any help!

A large rat weighs about 180-280 grams. Assuming she's eaten at least three meals since you got her in November without defecating, the gain is accounted for.

Alright. Well she has defecated a few times, but I will weigh her after she sheds and leaves my gift. Thank you again!