I would not get a card if I were you. I do not see any advantages for you to give her one and several reasons not to. Plus not receiving anything could even help your W think more. But at this stage your decisions should be ALL about YOU.
Best wishes.
R 25 years M 14 years S11 & S13 Working on it alone since Oct 2014 M in trouble a lot earlier (~2 years) Feb 2016. 1st R chat in a yr. Next R chat Aug'17 Still together