Backpacker, in post no. 38, brings up the most IMPORTANT suggestion of all.
The trouble with taking your lady up with you is that almost all men like to show off and impress the female. Sitting in the RH seat with a half-baked low time pilot who is mightily convinced of his ability is not usually a good experience for any woman. Especially if she is his partner and is well aware of all his shortcomings.
Say "I would love to take you flying, dear, but I would be much happier if first you could accept my gift to you of a day's flying with a PROFESSIONAL INSTRUCTOR!' Find a flying school with a female instructor - who will not only be safe, but can be a role model. The suggestion of Backpacker that your partner qualify as a Safety Pilot who can manage if you become incapacitated (any worse than usual) is excellent. Only after she has accepted this gift and still wants to fly with you, keep it short and smooth.
Buy her an airband set, arrange for her to learn to use the radio.
Let HER plan your trip together. Check the weather, use the charts etc.
Or even better, go on a course together at a gliding club next summer!