I know how you feel, I also have 2 cats and 1 box. It needs to be cleaned out at least 2 times a day. If I don't remind my husband to clean it everyday, he wont. My cats have their box in the garage and I walked out there a few weeks back and realized that it probably hadn't been cleaned in 2 weeks! My father in law even yelled at him for it... lol!
My doctor said that if I can avoid it it's best to not clean it at all, but if I HAVE to do it then use a mask and latex gloves. He also said to wash my hands with antibacterial soap afterwards.
You can clean it like this, but anytime that your fiance is available to clean it have him do it. To be honest, sometimes cats don't even carry toxoplasmosis, but it's best not to take that risk.
Good luck and congrats!
28wks with 2nd boy, and owned by 2 cats!