Yeah, it is tougher to tell when colubrids are gravid. They still look relatively slender, and some will eat right up until egg deposition if offered food. Occasionally males will show some interest in females even after ovulation, but soon give up after the females are just not cooperative anymore. I am a huge fan of palpation, as you can not only tell how far along the follicles are, but also how many eggs you can expect. Be cautious, but don't be too worried about hurting her or her developing follicles if you do try your hand at palpation, they are both quite resilient. I'm not sure what the average time from ovulation to egg deposition is in VBBs, but I would suspect about 45 days give or take depending on mean cage temperature. If you miss ovulation, but suspect she is gravid, just give her a nest box after the next shed, and she'll take care of the rest. I hope to see some pics of babies in the coming months, good luck!!

-Evan