NO! I was raised a Catholic and my Mother was a strong Catholic, and then switched over to the Wts. Her Catholic family accepts all of us and for the most part respected my Moms choice to change JWism. They didn't like it and tried to change our minds, but they NEVER came even remotely close to shunning us. Had the situation been reversed and JW family members become Catholic they would have been shunned. BIG difference.
-Integ.