I've been studying the Sugya of honoring the parents for almost a month now, and only today I stumbled upon Shu"A רמ"א that exempts converts from obligations to engage in burying his gentile parents.
I realized that nobody speaks of such a basic obligation of kids to their parents, as the Gemmorah only lists 3/6 (feeding, clothing and welcoming in and out). I know there's a Diun on the monetary obligation of the funeral, but no specific and clear obligation of burying itself.
There's a lot of Halokhos of honoring the parents after the funeral, but no reference to the funeral itself.
(Please help me to phrase the question properly)