I don't know where Malone and Bell's mother had intercourse, but the jurisdictions with which I'm familiar presume a 13 year old is incapable of consenting to intercourse. Therefore, the law classifies the act as rape.
I read the quote from Jemele Hill's story in Mars' post. Then I read the entire story. Hill said,
"What matters most is that Bell triumphed in spite of how his father behaved."
Let's focus on that, rather than on Malone's inappropriate behavior.