When the court hears that SHE has or had your password, and that you didn't have those conversations with her, and once you realized she had your password that you changed it, I'd lean towards those conversations or IM conversations being fabricated.
See -- I too have evidence of something that was said on the internet -- and got told that I will be accused of fabricating it all myself, but I know I didn't write all this. EX#2 and Camilla did and I found it years later.