Say that a man and a woman are dating exclusively (but not yet in formal relationship) and the woman has a colleague at work who flirts with her, regularly sending her inappropriate photos of himself (sexually suggestive/extremely vulgar). Would you consider it appropriate that she continues to maintain a close relationship with this colleague, including going to lunch together alone during work breaks, having frequent voice and video calls, as well as intensively texting and exchanging photos outside of work context?