Brianna Bailey, 21, was upset after breaking up with the father of her baby, 18-year-old Keegan Cook.
The Milwaukee mother jumped into Lake Michigan with her 2-year-old son, after warning Cook that she was going to do something.
Members of the Milwaukee Police Department’s dive team were called to the break wall near McKinley Marina after fishermen saw Bailey jump.
The boy and his mother were both rushed to the hospital, but Bailey didn’t make it.
Cooks says Bailey sent him a text right before she jumped.
“I was on the phone with her when she did that. I didn’t think she was going to do it. She was like, ‘I’m going to jump,'” Cook said.
He now plans on getting full custody of the baby.