From the link, quote by mom about dad:
One of the reasons we split up. I let him stay with me after she was born to help me out because I already had two boys plus her, to have extra help. When she was a newborn, up until 3 months, she had bronchiolitis. But she basically couldnt lay flat or she had a hard time breathing. We had to keep her in a swing to sit up. She was fussy. Im not going to say he slammed her down in the swing, but he put her down hard in it and thats when I told him he needs to get out. I know he does play rough with her.