Relationship between Moroi Vampires and Dhampir offspring

A rather interesting plot hook has presented itself, and has made me curious as to the relationship between Dhampir and their respective vampiric parent. I have looked into some of the basic information provided for each, but it does not speak too much on the relationship between the two.

Is there any existing lore that speaks about the relationships or disposition usually held between these two?

More specifically the Fullblood Moroi vampire towards their half-blood offspring?