How is 妻 written according to PRC and Taiwanese standard? Different fonts I see disagree in whether the fifth stroke should pass through the fourth or not.
You're halfway to answering your own question. On the zdic page theres a tab called 字源字形: 妻 字源字形.

Here's the part you're interested in:


  


The stroke you're talking about doesn't poke through in PRC but in Taiwan and HK it does.