What have you tried feeding her? I have a big girl who went off feed for 9 months, and just started eating again in June... she refused live & frozen mice/rats, but eventually went for a frozen ASF. As long as your girl's not losing major weight, and still seems normally active, I guess she's just not hungry yet.

Not sure about the chance of holding eggs that long, but I imagine you'd know if she was gravid by now. Did you notice an ovulation? My girl who fasted was also paired over the winter & spring, but never did lay eggs - so she probably reabsorbed the follicles, which might also be the case with your snake.