"I'm sitting in between my father and mother."

Translation: 我坐在爸爸和妈妈的中间。

[AlyciaPete]

I'm just annoyed that I got this wrong because I switched mama and baba around.

[DominicRei3]

我坐在爸爸和妈妈中间 should fine too, without 的

[james189798]

妈妈和爸爸 not allowed?