[marajade]

"It's HIGHLY relavent if she was romantic with the prosecution's STAR WITNESS!"

She'll have to get on the stand and take an oath before God that it happened. How is it relevant?

[Strider]

How is it relevant?

It's relevant, because it gives her a reason to lie. It's not a slam dunk, however. See L.N. Smitheess's post.