Uhmmm well if that was the impression you wanted to give of the Shinigami, it doesn't feel like that... It doesn't feel like she's trying to control him 24/7, as I said it seems more like she's taking care of him and the girls... In fact when she has reacted "aggressively" it feels more like is because how ungrateful the MC is towards her, as well as an unwarranted lack of trust... It's not as if the Shinigami was asking him for something that the MC didn't want to do or something that didn't benefit him or the girls, quite the opposite. Even her preventing Yui from getting pregnant was the right thing to do, despite that she did it for selfish reasons. What woman wants to get pregnant after her first time and at Yui's age?