Where did you read that Dave?

Nothing passed legally so-far. It's all part of diplomatic pressures.

To be on the safe side though, I would strongly suggest you make regular (even daily) visits to this webpage - Hongkong Immigration Department
If you scroll down on that page you'll see it's still showing Philippines at 14 days visa-free

I'd also suggest keeping tabs on this webpage also - Philippine Consulate General in Hong Kong
You can also send e-mail to them at hongkongpc@philcongen-hk.com

I think she'll be fine in December unless anything seriously dramatic happens any time soon.

Personally I doubt such sanctions will happen as things stand now.

Keep checking those links though