火上浇油

dāng tā yīn ér zi méi yǒu zuò gōng kè ér shēng qì de shí hou nǐ bù yīng gāi zài huǒ shàng jiāo yóu

当她因儿子没有做功课而生气的时候，你不应该再火上浇油。

You shouldn't make things worse when your wife was mad with your son for not doing his homework.

nǐ yīng zhì zhǐ tā men de zhēng lùn bù yào huǒ shàng jiāo yóu

你应制止他们的争论，不要火上浇油。

You should stop their quarrel. Don't add fuel to the fire.