But also not sure what could be done.
It's all fact, I know the people involved very well.
Headteacher of a large school, whilst married with young DC, had an affair with his deputy head. She fell pregnant, he divorced his (now ex) wife and married the deputy. They now have a baby and he remains her boss.
Where I work one, or (more likely) both would have been transferred to other posts/offices, but not so easy in a schol. Is it really appropriate that they remain in post, and that all the staff, who witnessed it all, are led by pair?