Sister Wives: Robyn Brown’s ex-husband David Jessop diagnosed with cancer

Sister Wives star Robyn Brown’s ex-husband, David Jessop, is battling cancer. David, who goes by his middle name, Preston, is the father of Robyn’s three eldest children, Dayton (birth name David Preston Jessop Jr.), Aurora, and Breanna. David has since remarried and shares four children with his current wife, Jen. Per a GoFundMe page, David