From my research prophet Muhammad loved khadijah it was unconditional he even use to remember while he was in the company of his other wives after khadijah passed away may Allah be pleased with her and during the time they were married the prophet didn't have another wife khadijah was his only wife till she passed away & Allah knows best.
Cognitive
Without Khadija's money and family influence, Mohamed's project Islam would have limited success or failed like many others did at that time. As for not marrying other women while he was married to her requires to understand from the premise of a simple logic of a "sugar mummy" refusing her "trophy husband" to bring other women.