Grammar - possessive usage with pronouns in a series?

[Relique du Madde]

That's all well and good but did they bring the beer?

What about the food? Are they going to bring some, after all I paid for their broke asses last night when we went out to eat.

 

[Jdvn1]

According to my wife Editrix the Grammar Girl (but one of her guises), a not so mild mannered Creative Services Director for a small southeastern university, the most correct choice is "Come over to Andew, Trey, and my house." Since the series ends in a possessive pronoun no 's is needed.

...

Treating the possessives seperately as in "I went to Bill's, Tom's, and John's place" actually means that the subject went to three seperate locations.

She always amazes me with this kinda stuff.

The Little, Brown Handbook is a great guide, and your wife is spot on. I just wanted to add that "I went to Bill's, Tom's, and John's place" is actually still a bit ambiguous, as "place" would have to be "places" to clearly refer to three separate locations.