I feel like I've carried this metaphor as far as it'll go.

我觉得我已经把这个比喻发挥到极致了。

She has to retract the driver's seat as far as it'll go, so she can maneuver her pregnant belly into the car, then bring it forward all the way so she can reach the wheel.

她不得不把驾驶座推到最后才把自己怀孕的肚皮挤上车，然后又把座位拉到最前端才够到方向盘。