I think Natalie is totally delusional. Evidently she has talked herself into believing that she did not give Matt BJ's. Personally I couldn't care less about whether she did or not but she has to realize that she is going to look like an idiot when she leaves the house. The proof of what she did is all on tape.
I really feel kind of sorry for her. 
I agree..
I feel bad for her at times but she is close to 30 years old. She isn't a baby.
Victim or victor..it's all there for the choosing.
These people knew what they were sigining up for and know they are being filmed. Sooo..they must want it out there. Don't you agree?
Yes I agree 100%. I have to wonder what kind of fairytale land she comes from where she can alter reality by just pretending it didn't happen. But then again I have 3 sisters who do the same thing. 
Is she "pretending" that the BJ's didn't happen? Or is it a matter of, "It's none of their f'ng business."? Nat will never "admit" to it, and I don't think she needs to.
Why does it matter to anyone in that house whether or not Nat had oral sex with Matt?
Why does Chelsia think it's ok to "call out" Nat on that? For what purpose? It doesn't improve Chelsia's status in the house....it doesn't help her stay....it doesn't improve her game play. So, then why bring it up? Because, Chelsia is "that girl" we all ran across when we were growing up. Chelsia's doing all kinds of sick things with the "gay" James (yeah....I say James is gay and said it before the show started. I stand by that.) and yet she will belittle another woman....ANY other woman in order to feel better about herself.
Shelia is another one. "I didn't know about that." Why should you?? It's not your business. It has nothing to do with you in the game.
I don't care what they see once they get out of the house....they will all be responsible for dealing with the fallout based on what they have done in the house.