The classmate comments of being aware that Stanley Ann married a black man is consistent with multiple witnesses having obtained this information when SADO showed up at the U. of WA and visited classmates as reported with a mixed race child.
This knowledge by classmates DESTROYS the Dreams “happy couple” myth on which Obama based his 2004 Convention narrative which in turn catapulted Obama to the presidency.
So it is entirely consistent and expected that the Obama truth suppression team would try to shut up Stanley Ann's Mercer classmates who could testify in court to fully corroborate the U. of WA transcript including being in Mercer 1960 class and being at U. WA with baby Barry.
The alternative non-SADO Anna Obama has no evidentiary support (documentary or eyewitness) and appears to be an artifact created out of whole cloth to preserve a fantasy that SADO was not Barry's mom and that someone else was.
Another version of the story is that they were told not to talk about their encounters because Stanley Ann discussed many aspects relating to the Kenyan birth of Obama, and that might be considered inconvenient to Obama’s claimed birth narrative. It’s interesting that any mention of this period has been blocked by Wikipedia. I know they have a lot of radical types at that site, but I never thought that they would block highly corroborated information in order to be politically correct, or whatever.