Looking at that scene, the character in silhouette sure looks like Mender. That would point to some time traveling business going on.
What a trip to find out that his romantic rival was his son.
I get kind of lost in the details. Were Mender and Kahvi ever in the Sun-Village at the same time?
In the picture on the left, it looks like the remembrance is of breast-feeding. And in the middle, it looks like the spear is pointed at the viewer, but Kahvi seems to be looking up and away. Kind of goes with the idea of her defending him from something.