I witnessed to my mom for many many years before she came to the Lord. It was an amazing thing for me to see her witness to my father. One day she just blurted it out and told my father he needed the Holy Spirit if he wanted to be in heaven with her and me and my husband. I nearly fell off my chair when I heard her say that. She was so excited that day. A baby Christian in her old age, but nevertheless a Christian.
You can read about her road to the Lord at the link … MY MOM
Just keep on praying and witnessing … only the Lord can do the saving 🙂