Police are investigating an incident which occurred during the early hours of the morning at a popular town centre nightclub.
The woman was with her boyfriend at NBs when the incident is said to have taken place.
A physical altercation then occurred between the woman’s boyfriend and the suspect.
Officers have released a CCTV image of a man, wearing a pink shirt and dark trousers, who they wish to speak with in connection with the incident and are asking him to come forward.
The man pictured was with a group of men who may also have vital information.
The incident happened at around 2.50am on Thursday, September 15, although the details have only just been released to the media via Northamptonshire Police.
Anyone with information can contact Northamptonshire Police on 101. Alternatively, they can call the independent charity Crimestoppers anonymously on 0800 555 111