LUCIFER: Not at all. I've been waiting for you... for a long, long time. Come on, Sam. You have to admit – you can feel it, right?

SAM: What?

LUCIFER: The exhilaration. And you know why that is? Because we're two halves made whole. M.F.E.O. Literally.

SAM: This feels pretty damn far from good.

LUCIFER: I'm inside your grapefruit, Sam. You can't lie to me. I see it all – how odd you always felt, how... out of place in that... family of yours. And why shouldn't you have? They were foster care – at best. I'm your real family.

SAM: No, that's not true.

LUCIFER: It is. And I know you know it. All those times you ran away, you weren't running from them. You were running towards me. This doesn't have to be a bad thing, you know. I let Dean live, didn't I? I want him to live. I'll bring your folks back, too. I want you to be happy, Sam.

Why is he lying