That scene is something Atlas Hallow could never forget.
At that time, he was drowning in guilt, after all, this girl simply loved him without reservation and gave herself completely, yet ended up in such a state, lying under the white blanket, she seemed so transparent as if she could disappear at any moment.
She said she wanted a child, she said she had frozen her eggs long ago because when they were together, she took contraceptives, and he remembered her crying while saying, "I'm afraid if I take too many pills, I won't be able to have children later. I've frozen my eggs. Atlas, I love you, so this is what I deserve. I don't blame you, but could you give me a child, a child of ours?"
In such a situation, he couldn't refuse her.
To elaborate, Hailey Hill is a pitiable woman; her parents only ever demanded from her, while Charlotte Miller was much luckier.