It seems to be the last feature she was in...I'm not gonna bother with getting this film if she's only in it for a cameo or only a couple of lines of dialogue.
"You see, Mr. Gittes...at the right time, the right place, a man is capable of...ANYTHING!"
Just in case you are still interested, Shannon Whirry takes part in the quite protracted finale and final battle (which is neither here nor there). Apart from that, I remember 3 scenes with her, mostly dialogue-heavy, involving either her daughter or her ex-husband, or both. So while neihter the film nor the dialogue are of high quality, I think she has some nice scenes which allow her to fill her "mother"/"ex-wife" character with some life.
"I am a bear of very little brain, and long words bother me." 4