Nice catch. If it's a widow, you'll know soon enough if she's gravid or not. They seem to drop sacks every 2 weeks or so, regular as clockwork. If you don't have a sack in a couple of weeks, she's likely not bred. She's a looker though. Great species to keep. they are very good eaters and extremely good at what they do.
If there were spiders in her web, it was either a male or a meal or both. Widows aren't known for having guests over. As far as babies go, they are usually about the size of a period on a page when they emerge from the sack but they leave the web soon after. Does she have the hourglass on her abdomen? If not she may be a steatoda which is still a cool spider.