@Doomsday8888 - Yeah, he's lying. Either that or he doesn't know the exact truth. We've seen in Star Wars Rebels that Force visions aren't always exactly true and the dark side is about deceit.

I think Rey and Ben are twins (ala the EU's Jacen/Jaina). The connection and the discussion alongside the transition to Luke and Leia helps me think this. Plus they took Ben, the name of Luke's son in the now Legends canon, and used it for Han and Leia's child.

I believe they are picking various things and putting a twist on it for the movies as a call back to Legends EU stories and for fan service.

How will they explain the twins? Rey was very young when she was left on Jakku. Kids change in appearance drastically from small to adult life, so it's entirely possible that both Han AND Leia wouldn't recognize Rey as an adult, but may have suspicions. Han seemed cool and familiar with Rey and she could navigate the Falcon well - this might have set off subconscious alarm bells, but he didn't have enough time to confirm. Leia seemed awfully casual with Rey as well.

Han taking and hiding Rey without Leia's knowledge is what caused a rift between them and broke up their marriage. He's stubborn and impulsive. He also took something without her consent.

As for the story about Han losing the Falcon - well, he made it up. He didn't know who Rey and Finn were and he didn't want to give info about his splitting his force sensitive child up on that planet.