Whoa! I've just lost my confidence about your seeming sober and calm approach. Your perception of HPV risks is badly flawed and your blame of your husband badly misplaced. That "my husband gave me a virus because of the irresponsible and careless decisions he made in his past" is simply wrong. And it is a sad commentary on your understanding to feel "that the man I would marry for the rest of my life would cause this harm to me".
First, you can't assume you originally caught the virus from him. Assuming you were not a virgin when you and he became a couple, it is equally likely you are infected from some other, distant past partner.
Second, the frequency of HPV, warts, abnormal pap smears is virtually the same in people with only a couple of lifetime sex partner and those with hundreds. Almost all sexually active people get genital HPV at least once, often several times. You were no more likely to have this problem because you joined your life with this particular person than any other partner you might have chosen.
Of course all this assumes there have been no other recent partners, either you or your husband. Of course you can judge this much better than I can.
1) The response to Aldara typicaly takes 4-6 weeks. In 30% of cases, it doesn't work completely and additional treatment methods are necessary.
2) You should continue your normal sex life with your husband; there is no need to stop sex. The horse is well out of the barn: it takes a year or more for warts to show up, once the HPV is acquired or it reactivates. He has been repeatedly exposed to your HPV infection for at least that long. Stopping sex now will make no difference in either clearing your warts or the chance he develops warts himself -- which is unlikely.
3) Multiple HPV infections are pretty common, but in your case, it's probably unlikely -- assuming your current infection is a late recurrence and not recently acquired. The low risk types like HPV 6 and 11, the main causes of warts, virtually never cause cancer or other serious health problems.
I think you might benefit from learning more about HPV in general. The thread linked below covers some of these basics; please take a look. You can also use the forum's search function to find hundreds of other discussions; or look at some reliable websites, like those of the American Sexual Health Association (www.http://ashasexualhealth.org) or CDC (www.cdc.gov/std).