Samantha Clayton

Sandra is a women who Oliver Queen had an affair on Laurel Lance with and accidentally got pregnant.

History
When Laurel proposed apartment searching with Oliver Sandra was the first of two known women that he cheated on her with, the other being Sara Lance, but he accidentally got her pregnant. Oliver became depressed when he learned this and told his mother. Later Mrs. Queen brought Sandra over to discus the matter and made her an offer: 1 million dollars to tell Oliver that she lost the baby and another 1 million to move to Central City and never speak to him again which after some uncertainty she agreed. Later on the phone she told Oliver the "bad news" and he was relieved that he wasn't going to be a dad, unaware of the truth however.

Trivia

 * Her name is confirmed on the Internet Movie Data Base website.
 * Some have speculated that her child in question is actually Conner Hawke the child of Oliver Queen in the comics and the next Green Arrow.