Actually no, I would NOT ADD "Will Steiger bumst St. Petersburg" for her.
Yes, she is technically in the movie, but only for about 30 seconds, and it's without any sex. The only thing we see is her coming out of a door naked (where her, another female and Will Steiger obviously just got through having sex), walking down a hall, and sitting down at a kitchen table while Will Steiger gets a glass of milk. It actually pissed me off..

...she is one of my favorite babes these days, and it would have been great to see Steiger's huge dick go in her asshole! Instead, it's just a tease about it, and the viewer never gets to see it. If anyone knows where that scene can be found, please let me know! In any case, the pics in the thread that you linked to are pretty much everything that we see about Abby in the movie.
So, although she does technically appear in the movie VERY briefly, it's only her walking down a hall naked and sitting down, no action!
