Tethys.
Although Oceanus and his wife Tethys did have immortal children they're true children are considered all of the aquatic bodies around the world such as oceans, seas, lakes etc.
The blades of Oceanus
Either Clymene or Asia, a daughter of Oceanus and Tethys the above, but also Aithra or Themis, wherefore his son Prometheus.
The parents of the Titan Oceanus are Gaia and Uranus.
Tethys
Tethys.
Tityus
tethys
Oceanus's wife was Tethys in Greek mythology, and together they were considered the parents of all rivers, springs, and bodies of water.
Clymene.
Yes, the sister of your spouse (wife or husband) is your sister-in-law. In addition, the wife of your brother is also your sister-in-law.
Your wife's sister is your sister-in-law.
Your wife's sister is your sister-in-law. You are not related to your wife's sister's husband.
No, your wife's sister-in-law may be your sister. Your wife can also have a sister-in-law who is not related to you; that would be the wife of her brother.
Although Oceanus and his wife Tethys did have immortal children they're true children are considered all of the aquatic bodies around the world such as oceans, seas, lakes etc.
Your sister and your wife's sister are not related to each other.