If you weren't careful and didn't pay attention to the snakes body condition (which is another part of knowing what to feed when that can't really go into a chart) you could risk obesity. It's assumed breeding animals are going to be using a lot calories and energy during the entire breeding process, and at some point they're probably gonna go off food, so they need to go it with some extra reserves and then you have to build them up for next season.
That said, depending on your individual snake's metabolism and activity level, you could just end up with a perfectly trim and healthy, while rather large snake.