Play games with them that can distract him from hitting her.... such as hide & seek (indoor or small area just in case).. which can definitely burn lots of energy through running, hiding & laughing...
else can jus try eating less sweets = less sugar= less energy = more healthier too~
U forgive him so mnay times, your children will find out in the future one day.. You are indirectly teaching them that 'adultery is ok! there's always forgive & forget!'
My baby also love to make me boil each time. Sometimes I do spanked her, but always for a reason to make her quiet down. Never vent your frustuation on a baby.