Yes. It's a bit doubtful whether much of what you can say will be allowed in evidence. It depends how soon after the event she was telling you this. Your statement of what she said happened can't be proof that it did happen, but in some circumstances her state, state of dress or undress, torn clothing or whatever may, just, be admitted to show some support for what she says happened
However, that's for the lawyers. It has been decided that you are needed at court to give evidence about something or other, so you must attend in response to the summons.