Jeff your wife looks great! I think everyone has said what could improve it to wonderful - a little more value contrast. Don't make it up, have her go get in the same position and just do the shapes in values, sketch them on tracing paper to the same scale - then apply them to your actual drawing!
Did you follow the Tony Ryder envelope etc. on this one?
I think the self portrait in a mirror is so hard. Especially when you wear glasses! You need to have a definitive light source for your self too. As Marvin's mantra goes... the head is a ball, the head is a ball. Think of the light that way.
A big thank you too for your nice comments and consistent ongoing support!