wǒ / běn lái / xiǎng / gěi / tā / yí gè / jīng xǐ / méi xiǎng dào / tóng shì / zuǐ bù yán / tí qián / bǎ / xiāo xi / shuō le chū qù

我本来想给她一个惊喜，没想到同事嘴不严，提前把消息说了出去。

I had planned to surprise her, but I did not expect my colleague to have a loose tongue and reveal the news beforehand.