Great to hear Gerry!!!!
Your plan on the Christmas surprise, I would even take a step further. How about having Fiona placed into a huge box (wrapped) and have it delivered by someone you know and trust to your Mom's house that day as a Gift for her (her new daughter in-law).
One of my Cousin (male) boxed himself at X-mas and came to his Girlfriend to propose for marriage to her. The most romantic thing I ever saw.
Anyway, enjoy your new less stressful Life now and your new house in-waiting!