How come if you think about it the dates surrounding Sandy and Kirsten's marriage and meeting etc don't add up. They met when Sandy and kirsten were both in college but in one episode Sandy says they've been 'working' on their relationship for 25 years! But they celebrated their twentieth a two years ago and Kirsten only just turned 40 so at the time when she'd been married for twenty years she was 38. But they didn't get married when she was 18! Seth is now 18 which means she gave birth to him when she was 22 but their are photos showing her carrying him as a baby next to julie carrying Marissa as a baby and julie got married because she was pregnant and in one episode she said she was married a 'year after marissa is now' which made julie 18 when she married as marissa was 17 when she said that.  Since julie is only 36 , kirsten is 40 that would work but sandy is meant to be 44 and two years ago he says in one episode that he met kirsten 25 years ago, which means he met her when he was 19. Therefore if he is four years older, kirsten must have been 15 when they met! It's all messed up!