Toxic family univited!!

I have 3 nieces that i love and want to.come to our family thanksgiving celebration...however they asked if they can bring their dad....(who i absolutely despise so much he makes my skin crawl!!! I dont feel comfortable with him around me!) How do i politely tell them no (nieces are 14-16- and 17)...they have expressed they are coming and that they look forward to it! But then have asked last minute if their dad can come....how do i go about telling them i am not comfortable with their father even being close to me...much less in my home with my two beautiful daughters as well. (He isnt a good person and scares me to no end!) Please help! I dont wont to upset my nieces...but i will not accept him into my home! Thats a HARD NOT AN OPTION! I dont even want him to know where i live!