Kate and Aaron go to Cassidy's house, we see Clementine

Kate and Aaron go back to Cassidy's house shortly after the grocery store incident. There is a no soliciting sign above Cassidy's doorbell much like the one Locke had on his door when he lived in the apartment. We finally get to see Sawyer's daughter Clementine who answers the door and calls Kate "Auntie Kate." She goes to get her mom and that's last we see of her.

Kate tells Cassidy about Jack and the others going back to the island. Kate tells her that Jack said they were not supposed to leave the island and Cassidy replies "Well Jack sounds like a piece of work." Kate then tells Cassidy how she lost Aaron in the grocery store and she says that she wasn't surprised and it was about time that it happened. Kate asks "Why would I expect him to be taken?" Cassidy replies "Because you took him Kate." Kate defends herself saying that Claire left Aaron and that she had to take him because he needed her. Cassidy tells Kate that "You needed him" because Sawyer broke her heart and Aaron helped fix it.

Cassidy tells Kate what's what in this scene, though the emotional reasons for Kate needing Aaron is just speculation. We finally see Clementine but for only a few seconds. I wonder if she'll show up again. Clearly Kate and Aaron had been to see Cassidy and Clementine somewhat regularly because Clementine immediately recognized Kate.

Kate visits Cassidy Phillps for Sawyer, gets an earful

Back in 2005, Kate goes to visit Cassidy Phillips, Sawyer's ex and the mother of his child Clementine. Presumably she still lives in Albuquerque, New Mexico. She has baby Aaron with her. She knocks on the door and Cassidy recognizes her from their previous experience back before the crash of 815. Kate tells Cassidy that Sawyer sent her, finally confirming what we've all known he told Kate before jumping off the helicopter.

Kate gives Cassidy an envelope full of cash that is from Kate's settlement with Oceanic. Kate also tells her the truth about what happened after the crash. Sawyer told Kate where to find Cassidy and to take care of Clementine, who's apparently asleep in her crib. That would place Sawyer's relationship with Cassidy not long before the crash and not long after he was released from prison. Kate tells Cassidy that she told her the truth because she though Clementine deserved to know that her father cared about her. Kate then tells her about Sawyer jumping from the helicopter and Cassidy calls him a coward for it. Cassidy says that he jumped to get away from Kate. Cassidy goes on to ask if Aaron is Sawyer's son. Kate tells her that she was pregnant before she met Sawyer. Cassidy quickly realizes she's lying and that the baby is not hers. Kate says she's lying about Aaron "because she has to."

Nothing too deep to delve into here. The biggest thing of interest is how close the timeline in which Sawyer meets Cassidy and gets her pregnant, when she turns him in and he goes to prison and when 815 crashed. If in 2005, Clementine is still a baby, all of those events happened pretty close together. Sawyer was a busy guy.