Finland's former Prime Minister Sanna Marin, who narrowly lost an election in April, stepped down on Friday as chair of the centre-left Social Democrats, hoping to take the focus off her personal life after an often turbulent four years at the helm.
The video makes it pretty clear what's going down. She has also stated nothing happened he wasn't aware of, so it might not be cheating regardless.
Seems an awfully specific phrasing in English in regards to what he has agreed to in their relationship, but maybe it's less suspiciously specific in Finnish.