Dennis Quaid has filed a petition to cease all future child support payments to his ex-wife, Kimberly Buffington, following the high school graduation of their 18-year-old twins, Zoe and Thomas. In recent court documents obtained by USA Today , The Substance star , 72, cited the terms of their 2018 divorce agreement, which state that he may stop paying $13,750 per month in child support “when a child completes 12th grade.” His two youngest are set to graduate from high school June 3, according to the outlet. Additionally, Quaid requested that the bonus amount he is supposed to send to Buffington if his annual income exceeds $1,314,000 be prorated to “each child’s graduation date rather than using Dennis’ full-year 2026 income.” A representative for Quaid declined The Independent ’s request for comment. Quaid was married to his third wife, Buffington, from 2004 to 2018. He was previously married to his first wife, P. J.…