One of the ways to express lateness in Chinese is with 才 (cái) in Chinese grammar.

Structure
To express that something happened later than expected, you can use 才.
subject+time+才+verb+object
In English this might be expressed with "as late as" or "not until". This form is often used with a time number of some sort, like a specific time, age etc.

Examples 

Note that verbs following 才 cannot take 了，as the action does not have the sense of being completed. So, in the above situation, it is wrong to say:
昨天晚上我的女儿一点半才回家了。