YOU SAID:

dogs are mean when cats are nice to your father while I eat pizza

INTO JAPANESE

私がピザを食べている間、猫があなたのお父さんに優しいとき、犬は意地悪です

BACK INTO ENGLISH

The dog is mean when the cat is nice to your dad while I eat pizza

INTO JAPANESE

私がピザを食べている間、猫があなたのお父さんに優しくしているとき、犬は意地悪です

BACK INTO ENGLISH

The dog is mean when the cat is nice to your dad while I eat pizza