Anthony Duwayne Turner, 52, was charged and arraigned Monday.
He's accused of beating and killing 48-year-old Michelle Avan at her home last week.
Along with the relationship Turner also worked with Avan.
Suspect arrested in killing of Michelle Avan
Her family was also in court.
Avan's son spoke out to seek justice for his mother.
"My mom Michelle Avan didn't even have the opportunity to see her granddaughter turn two," said Trevon Avan. "We're asking the public, we're asking everyone at home to please help us in making sure that this case gets the attention it deserves. And that we get justice for our mom, Michelle Avan."
Avan was a senior vice president with Bank of America who worked to recruit women and under-represented employees globally.
Turner is due back in court next Monday.