If you can manage it, pay one of her bills for her - doesn't need to be anything major, but this month's credit card installment, her mobile phone charges, etc. That way, it isn't so much a 'gift' gift, but it both serves to show your appreciation and gets you off the potential hook of not doing anything at all.
Boru
Boru
‘I can’t be having with this.’ - Esmeralda Weatherwax