YOU SAID:
Your mom is so ugly that when she looks in a mirror, the mirror breaks.
INTO JAPANESE
あなたのお母さんはとても醜いので彼女が鏡を見ると鏡は壊れます。
BACK INTO ENGLISH
Your mother is so ugly that the mirror breaks when she looks in the mirror.
INTO JAPANESE
あなたのお母さんはとても醜いので、鏡を見ると鏡は壊れています。
BACK INTO ENGLISH
Your mother is so ugly that looking at it is broken.
INTO JAPANESE
あなたのお母さんはとても醜いのでそれを見ていると壊れています。
BACK INTO ENGLISH
Your mother is so ugly that looking at it is broken.
That didn't even make that much sense in English.