To be honest I really don't believe that my lad is allergic to cats, he's spent every Sunday here for roughly 7hrs and not once had any reaction. The kids spend their first overnight with us in over 15 months and the psycho has a full blown melt down over him now being allergic. I've even offered to take him to the doctors to be tested but no that's not good enough for her.
I'll pick up some Anti Histamines for him, ban the cats from the upstairs etc and see how we get on.