Do not get her a Christmas gift. She fired you as her H, and that is something a H would do. If she gives you one I would consider not accepting it. "I didn't think we were exchanging gifts this year, so I cannot accept this." If she insists, thank her in a gracious manner, and then do not open it in front of her.
M(53), W(54),D(19) M-23, T-25 Bomb Drop - Dec.23, 2017 Ring and Piecing since March 2018