主从句时态不同的状况含义

That is what his wife said.
That was what his wife said.
主句的时态分别用了通常目前时（和从句时态不同），通常过去时态（和从句时态一致）。那样主句的两种不一样的时态致使两句话的意思有哪些不同呢？盼专家老师解惑。

“那就是他老婆说的话。”

1. That is what his wife said. （正确）

2. That was what his wife said. （应改为：That was what his wife had said.）

我觉得，这个句子中表语从句的时态有问题。主句和表语从句的时态需要有先有后，“说话”应发生在was之前，故用过去完成时。

这两句有什么区别，我用最简单的道理讲一下：句1等于一个直接引语，句2等于转述句1的内容，即间接引语。