I finally managed to learn a little more about Virginia's life post-Titanic, thanks to the LA Times archive. I've yet to spring for the articles, but will share them once I have. Here's what I've gleaned from the headlines and synopses...
In October of 1912, Virginia married Dr. Jack Tanner in New York. Her powerful father-in-law, J. Ross Clark, publicly decried her actions and moved to gain custody of Virginia's son, J. Ross Clark II, on the grounds of willful abandonment. He was initially successful, but Virginia fought back, and it appears the boy was shuttled between his mother and grandparents throughout his early childhood as one side, then the other, won the next battle. One article had Virginia entering the Clarks' home and forcibly removing her son after his grandfather failed to hand him over at the appointed time.
J. Ross and Miriam Evans Clark evidently buried both their children. I know that their daughter Ella lived long enough to be married, but I'm not sure when exactly she died or if she had children. Her husband, Henry Carlton Lee, is listed in the 1923-24 Southwest Blue Book with her parents but without her.
John Ross Clark II grew up to be a racehorse owner, and was married and divorced at least once.
In 1919, Virginia obtained a divorce from Jack Tanner, naming a Pasadena woman as co-respondant in her suit, or so the media coverage claimed. According to a NY Times article I saw (and misplaced) years ago, Virginia's son walked her down the aisle when she married a Philadelphian named Rush in 1927. This marriage also ended in divorce, and she and Tanner were remarried in 1930.