Why did Mike marry Apollonia?

Could you elaborate on the motivations behind Mike's decision to marry Apollonia? Was it a spur-of-the-moment choice, or did he carefully consider his feelings and their compatibility? Was there a specific event or series of events that led him to this conclusion? Additionally, what role did their personal values, goals, and aspirations play in their decision to tie the knot? Lastly, how do their individual backgrounds and experiences contribute to the depth and complexity of their relationship?