YOU SAID:
your mum stabbed herself with a dying cat
INTO JAPANESE
あなたのお母さんは死にかけている猫と一緒に刺された
BACK INTO ENGLISH
Your mother was stabbed with a dying cat
INTO JAPANESE
あなたのお母さんは死ぬ猫に刺された
BACK INTO ENGLISH
Your mother was stabbed by a dead cat
INTO JAPANESE
あなたのお母さんは死んだ猫に刺された
BACK INTO ENGLISH
Your mother was stabbed by a dead cat
That didn't even make that much sense in English.