Please keep praying for dad and mom's salvation. There is something good I've noticed about dad. He's watched Jack Van Impe with mom before.
I don't know when mom and I started watching Jack. I know it was before Jesus saved me. I don't know if it was a year or more [or less] or not. All that time has been worth it though because now dad has watched atleast a few episodes. And,within the past year, I've seen the Holy Spirit working in mom's life more than in any other time of my knowing Christ [which has been over 3 years].
Yes, I think it's a great sign that your mom is asking questions, and that your mom and dad are watching Jack Van Impe. And you gave a great answer to your mom. It proves that she is searching, and that's always good. Praying that the seeds you are sowing will bring in a harvest soon!
And Patti is right, you are a good daughter! So many of your posts center around asking for salvation for your mom, and the things she says and asks about Jesus.
I'm praying for salvation for both your mom and dad.