In most versions, the conflict arises from Alunsina's longing for children. She begs Tungkung Langit for them, but he refuses, prioritizing his duties as the sky god. This leads to Alunsina's frustration and eventual separation from him.
Some versions might depict Tungkung Langit as indifferent or uncaring towards Alunsina's desires, but not necessarily as actively despising her. The emphasis is on their differing priorities and the consequences of their actions rather than outright hatred.
However, some versions might present a more negative portrayal of Tungkung Langit, implying he is jealous of Alunsina's beauty or dismissive of her feelings, which could be interpreted as contempt. However, this is not a consistent or universal aspect of the myth.
Ultimately, the nature of their relationship and the reasons for their separation are open to interpretation, but despising each other is not a core element of the story.