Ohh, here comes my dad and stepmum.

呀, 我父亲和继母来了。

And how do you get on with your stepmum?

你和你的继母相处得怎么样？

My own research found that stepmum's have significantly higher anxiety than biological mums.

我自己的研究发现，继母的焦虑程度明显高于生母。

But if I ask the same people, " What's a stepmum, what's a stepdad? "

但如果我问同样的人，“什么是继母，什么是继父？”