Is this save before or after you noticed the bug? Since loading it in is not giving me the message.
To try and replicate the bug, I had to set a flag for the gabilani pirate's pregnancy so I could get the option to refuse her. When I did, the combat aborted as intended, so I did not run into the bug you've described.
If this is still an issue, can you provide some sample text of the scene right before the bug appears?