Ok here it is, the family tree (just pay attention to the names, as the ages are not actualiced...)
William (PK; with two manors, one gifted, one granted) marries Bernadette and have two children, Eduard (now 16 y.o.) and Markus.
Bernadette dies and William luckily marries Elizabeth, whose dowry includes one manor. They have four children (their eldest male son is Egbert, now 5 y.o.).
Now William is dead, and the player after playing two years with Julius (William's uncle, and also a veteran knight of his household) wants to play with Eduard as squire of another PK.
Does the widower keeps the whole manor she "provided" (as dowry) to the marriage? Or does she keeps a regular widower portion of 1/3 of each manor? What happens with the rest of the landholding until Eduard comes to age? And when he eventually comes to age? And after Elizabeth dies?