Most places that depend on American tourism (like Carribean islands) have easy internet access these days. However, lots of rural areas in the US don't have good cell phone reception or broadband or anything. So she may not begoing anywhere fancy at all.

Regardless of what she's doing, seems like it would be better to concentrate on somehow making this a fun holiday for you. Maybe there's a way you could treat yourself? Get yourself a present, make yourself a lobster, even just a bubble bath? Something nice you can look forward to and enjoy.