Viewers tuning into CNN around 12:30 PM ET could be forgiven for thinking they saw double. That’s because they sort of did.

CNN anchor Suzanne Malveaux interviewed her twin sister Suzette Malveaux about the sex discrimination lawsuit facing mega-retailer Wal-Mart.

Suzette is a law professor at Catholic University, and something of an expert on class-action lawsuits, or as Suzanne explained in introducing her:

Joining us from outside the Supreme Court, Catholic University law professor and author of a casebook on class action lawsuits and an article on the Wal-Mart case specifically for the Harvard Law and Policy Journal is Suzette Malveaux, who happens to be my sister. Full disclosure.