I just know the thought of it arouses me quite a bit and want her to share it with me. No, you're not perverted at all. When you have some quiet time alone, but NOT in bed, discuss your desire for anal stimulation. Most people dont understand the rectum has many nerve endings which afford much stimulation for both men and women. Possibly if you watched it together it would be beneficial.
Many people enjoy the added stimulation of anal toys when masturbating.
I would suggest starting with a small jelly or rubber butt plug or an Anal-T, both of which can be found in my catalogue. A shower together before sex is helpful and always use a good water based lubricant liberally.