The last comma in a list of adjectives.

[SixImpossible]

I just typed something along the lines of:

"She is the most strait-laced, conventional, person I know."

Should it have been:

"She is the most strait-laced, conventional person I know."?

What if the list of adjectives is longer? I know that when you have a list ending with "and (last item)", you put a comma after each item except the penultimate item. Unless the list is very long or complex, in which case a comma before the "and (last item)" is acceptable. Is it the same for adjective lists?

No comma after the last adjective.

Both are correct. It is a matter of personal style.

No comma after conventional, there's no need for it as the list of adjectives has ended.

Gavel.

Comma after conventional is incorrect: in lists such as this the comma does the work of "and":

She is the most strait-laced and conventional person I know.

On the other hand, not all listed adjectives need a comma. I can't remember the term off the top of my head but it's to do with whether it describes or defines.

She was the most patronising and strait-laced and conventional heavily tattooed bisexual person I had ever met.

Use commas where and makes sense, and omit them otherwise.

My heavily tattooed, bisexual sister is, oddly enough, the most patronising, strait-laced and conventional of all my siblings.

No comma after the last adjective! It is wrong. Thanks, mrs Hathaway!

Sorry it is wrong. Can't think why is said that.

Thanks.

MrsH, I nearly inhaled my tea with laughter - I was describing my MIL!

Isn't it "straight-laced" as in all the laces of her corset are neatly aligned? Or is it strait because the laces pull her waist in to be very narrow?

The second, I think.

But very willing to be corrected if I'm wrong!

Strait as in narrow. Unlike a lady of the night, who would have hers more easily removable...

It's the Oxford Comma, and entirely at the discretion of the writer. I think there might be some caveat for a list of only two, though - seems too few.