I positively love Shimura Takako's works. All of them.
Her characters feel so real. They are fucked up, make bad decisions, are cowards, or just throw themselves forward because they are desperate. They change, they mature, or just can't move on... They are very real. I've rarely read manga where the characters reactions are so believable.
The husband's reaction is totally what you'd expect from a normal "good guy". You can't help but feel bad for him, but it does not mean he should "win". Ayano should just choose her own life.
I don't feel her manga are "edgy". She puts her characters in complicated situations and derives believable reactions from them. I never felt any discrepancy in her characters behavior along the story. She's really consistent in portraying people.