Last night, trans woman and author Janet Mock appeared on "Piers Morgan Live" to discuss her new book, Redefining Realness. But maybe it was Morgan who needed some definitions to work with.

During the apparently friendly interview, Morgan repeatedly turned the subject back to Mock's physical transformation and her relationships with boyfriends past and present. The interview also repeatedly featured an on-screen crawl reading, "Janet Mock: Was a boy until age 18," despite the fact that Mock identified as female long before that.

Piers Morgan Demands Apology from "Disgraceful" Trans Woman Guest

But it didn't end there. After the interview aired, Mock sent a series of tweets to Morgan, blasting the host for his apparent lack of awareness of trans issues.

"He's trying to do info-tainment," Mock told BuzzFeed after the interview. "He doesn't really want to talk about trans issues, he wants to sensationalize my life."

Morgan responded with thoughts of his own.

The issue got Morgan into such a huff that he eventually vowed on-air revenge. Look out for round two on his show tonight.