Still dont justify his action locking her out of her will though. He couldve just say, use Kyle to ensure her safety but no he decided to jail her himself. Plus, her mental health and health in general are deteriorating under his care, and choices on whether he should safe his wife or baby (we all knew both of them are alive even after consuming the med but it is pure luck since med was stated to be highly risky to be consumed by mother to be) would never even be there if he didnt do what he did. Locking her up because its unsafe since the area is an active warzone seems like a possesive measure he is taking. Plus, he knew Kyle was there too and he tried to make Kyle stay away from her despite knowing he is the only place where Leyla can feel at ease.

He will love the baby later on. the kid grew just like him, black hair blue eyes. People call him the nice Matthias. Matthias, like i mentioned only care about Leyla initially. The only reason he said he cared about the baby in the womb is to chain Leyla up. Iirc he definitely had thoughts about killing his baby while it was still in womb. When Leyla fell ill while in captive in the duke's room (they were in a war and they managed to capture this one city where Leyla happened to be in and they turned this one hotel into their base), he wanted to take everything to treat her even if it kills his own child. Kyle was the one treating her since he became a doctor and got served along with Matthias team. Arguments later and Leyla recovered and baby is still alive. Matthias wanted the baby to be a girl cuz he only suggested name for girl when Leyla asked him to name their kid. Felix was born and he was well loved. Though i hate hate hate Matthias's possesive trait to the core, it was quite a happy ending. Author's way of sort of redeeming Mathiass sin was by almost killing him in the war. People thought he was ded since news spread about it too, one of the reason why Claudine break her engagement and got engaged to another person. It was thanks to Matthias's grandma connection to Lovita's royals he was rescued.

Leyla redemption arc for sure brings pain to the duke when she asked him to promise to love her. But duke got the upperhand later on... again. Uncle Bill death almost meant nothing cause he loath the duke until the end of his life but Leyla still got entangled with this pr***. The duke basically caged pregnant Leyla and keep on making her to love him and he was pretty twisted himself. He threatened Leyla saying he cares about the child in the womb but in reality he dont give a sh** he wanted to kill the baby and almost succeed when Leyla fell ill. He only cared when Leyla actually accepted him.