I would also consider Mt. Adams. This peak is nestled in one of the most beautiful areas of the high peaks. Views of Colden, WallFace, McIntyres. RT you are looking at 4 miles, and there is a fire tower at the top which is often a good goal. All this for about double the effort of Severence. There is also a nearby ghost town which you could poke around in if you have extra time and are interested. Email me for pics.
The other Peak I would consider is Noonmark. The trailhead starts at Keene Valley, and the nearby "hiker hostel" allows you to shower for a scant $3 if you are planning on cleaning up for a nice meal afterword.
Personally I would recommend against Hurricane given the hikes you have listed. My parents did that one a couple of years ago, and they said it was fairly difficult. (They are not experienced hikers) Sounds like you are going for something a little more low-key.
My recommendation, get her interested, and soon we will see you back here asking about which 46er is the best one to take your wife on first!
-percious