Policy owner died, beneficiary wants to keep policies up.

my father had two whole life (cash value) life insurance policies on both of my grown children. I am the beneficiary on both policies and my parents paid on these since 1989. My father died last month and my mom had past 3 years ago. I wanted to keep paying on these policies so they will remain in effect. Is that possible or do these policies simply become void since he has passed away?