ANIM Mother & Wife - Itsu made mo Mama to Issho! - Yuuwaku Mama no Oppai ni Amaete Ippai Shasei Shitai! Final (jap)

The protagonist, Kanzaki Takumi, has a worry. It's about his relationship with his recently remarried father's new spouse. He struggles with how to interact with her and feels awkward. However, with advice from his own mother, Misaki, he gradually deepens his bond with his new family. On the other hand, Misaki, despite her son's worries being resolved, feels a sense of loneliness. Even though things should be going well, she can't help but feel anxious and jealous, fearing that her son might be taken away from her. She knows such feelings are not appropriate as a mother, but she can't bear to let go of her son...