looks like powdery mildew to me,
http://www.google.no/images?hl=no&q=powdery%20mildew&um=1&ie=UTF-8&source=og&sa=N&tab=wi
increase air circulation and ventilation, allow foliage to dry before turning off lights, remove and destroy foliage more than 50% affected.
a saturation of baking soda spray dries to a fine powder on the leaf. the baking soda changes the surface ph of the leaf to 7 and powdery mildew cannot grow.
good luck to you and your lady.
- also. read as much as you can about powdery mildew so you can take precautions so this dont happen again.
edit: just read ur 7 weeks in.. might want to be careful with sprays... bud mold ect