Bench being such a technical lift and the fact that she likely doesn't train it much (or at least in a powerlifting capacity) I doubt she can do a crazy amount. 185-200?
With her musculature I'm guessing 225+ would be fairly easily attainable with a reasonable amount of dedicated training.
There are female powerlifters who have less muscles than her that can bench over 300. Random example, Jennifer Thompson (who competes at 63kg/about 140lbs) pause benching 325:
As you can see, technique and skill play a huuuuge factor.
Dope