Explanation

"And why's that? Why does she think you're screwing a black man?" asked Tony, now measuring his mood.

"Because she felt sure I was seeing someone for some reason, sisterly instinct maybe. And she was right, but the someone I'm screwing is this someone." Sofia pointed at Tony. "Marcia and Livia came and met me for lunch and were pumping me so hard that I spun them a line, and hinted that my new man might not be white. I think it’s completely thrown her off the scent."

Sofia's fearless explanation seemed to convince Tony. Boy, she had some guts.