Complex sentence: If she has an "A" support with Artur or Kyle, she will marry him in the game's ending and have a son, and she moves on to studying him instead of spying on Artur as his habits baffle her.
Split into simpler sentences: If she has an "A" support with Artur or Kyle, she will marry him in the game's ending. In her ending with Artur, they have a son, and she moves on to studying him instead of spying on Artur as his habits baffle her.