I am one of those allergic people, who is allergic to cats, now proud owner of two., however asthma I donot have except now as I am older and in the winter.

I think what craftlady suggested was brilliant.

Is there anywhere you can put the pets in safety whilst they visit, unfortunately animals often trigger an attack.

you can only do your best to alleviate her symptons, when she visits, otherwise maybe you will just have to do most of the visiting.

Good luck.