Shari Smith was the step-mother of Tim Smith who attended Tree Hill High School with Karen Roe and Dan Scott. Karen later encountered her after Lucas joined the Ravens and discovered she was still as preoccupied with popularity and elitism as she was in her high school years.
Shari was introduced as a mother from the school who invited Karen to join the boosters, but told her the wrong time for the meeting, so as to make her look bad in front of the other boosters.
Although Shari wasn't visually seen in Season 2 she was the subject of Nathans Bachelor Party when Tim put on a sex tape of Shari.
Shari mocks Karen when she shows up with Dan Scott to the Basketball Awards ceremony, by pointing out the fact that she is also pregnant, insinuating that it is just like high school. Dan, however, defended Karen by saying that Tim is no-longer on the basketball team and has moved to a "special" school.