Chelsea is very shocked when she borrows Charlie's phone and discovers some nude pictures on there. Good old Berta is always there for support... or to laugh at his misfortune.
Added:
Conchata Ferrell stars as Berta on Two and a Half Men. Berta is Charlie's hilarious maid that always seems to be around.
Added:

Two and a Half Men Quotes

Charlie: You're like an Alzheimer's patient in a whorehouse.
Alan: What do you mean?
Charlie: You're constantly surprised that you're getting screwed, and you don't want to pay for it

Yeah, hi. I'm watching your commercial cash for gold and you just showed a woman selling her wedding ring for $500. No, I don't want to sell gold, I want to meet her. She's hot and we know her marriage isn't working out.

Charlie