It may be perhaps splitting hairs, but this definitely seems like a case of "lying by omission" to me.
"She met Buffett herself, saw his genius, and made him her professor." would give any normal person reading this a completely false understanding of what actually happened.
I just couldn't tell if there was a dispute about Graham and Buffett's affair. The stuff I read was pretty specific; like, she'd toss him her house keys when he arrived at parties.