She is leaving at the end of May. She has been phenomenally good for DH, and the only reason her contract is not being renewed is that she is not a yes-woman (US military employment law applies, lots of nepotism).
So I have sneakily found out whether she has pierced ears and what her favourite colours/styles are and made her a pair of amethyst/Venetian glass earrings in an origami box made by the DDs. I have written her a card with a personal message telling her how much I appreciate everything she has done to make DH's stressful work situation over the last 3 years so much easier.
Dh says she got all teary...