Tattvārtha Sūtra primarily describes heavenly beings (devas) in terms of their types, realms, lifespan, powers, and births. It does not focus much on their personal interaction like human social relations.

What it tells us, in Jain understanding, is:

• Heavenly beings exist in the deva gati.
• They are born according to their karma.
• They live in various heavenly abodes.
• They possess greater pleasures, radiance, and subtle bodies than humans.
• They can interact with one another in their own heavenly realms, but such interaction is still within the bounds of karma and transience.

Important Jain teaching:

• Even heavenly existence is not liberation.
• Heavenly beings also remain in saṃsāra.
• Their pleasures are temporary, and after merit is exhausted, they fall to another gati according to karma.

So, if you are asking specifically about how heavenly beings relate to each other, Tattvārtha Sūtra gives only a general doctrinal picture, not a detailed description of their daily interaction.

If you want, I can explain this in a sutra-wise Jain interpretation.