YOU SAID:

ok so i accidently ran over your cat, mittens.

INTO JAPANESE

わかったので、偶然あなたの猫、ミトンの上を走りました。

BACK INTO ENGLISH

Okay, so I ran over my cat, the mittens, by accident.

INTO JAPANESE

さて、偶然、ミトンである猫の上を走りました。

BACK INTO ENGLISH

By the way, I ran over a cat that was a mittens by accident.

INTO JAPANESE

ちなみに、偶然ミトンだった猫を走りました。

BACK INTO ENGLISH

By the way, I ran a cat that was accidentally a mittens.

INTO JAPANESE

ところで、偶然ミトンだった猫を走らせました。

BACK INTO ENGLISH

By the way, I ran a cat that was a mittens by accident.

INTO JAPANESE

ちなみに、偶然ミトンだった猫を走らせました。

BACK INTO ENGLISH

By the way, I ran a cat that was accidentally a mitten.

INTO JAPANESE

ちなみに、偶然ミトンだった猫を走らせました。

BACK INTO ENGLISH

By the way, I ran a cat that was accidentally a mitten.