There is no special English word for elder sister.
Kissing is sometimes a prelude to sex but not always.
In Marathi, elder sister means "Thorali Bahin" younger sister means "Dhakati Bahin"
In Tamil, elder sister is called "அக்கா" (Akka).
"Sister" in Tamil is called "சகோதரி" (Sakothari) for an elder sister and "சிச்டர்" (Sister) for a younger sister.
The English language makes no distinction between an elder sister and a younger sister, or their children. Your sister's son is your nephew.
Hestia.
The Tongan word for elder sister is 'tu'a'ane' or 'tu'ahine' depending on the gender of the speaker.
If your partner is disease free, yes kissing sex organs is safe.
Elder Sister: Akka Younger Sister: Chelli
Hestia.
fathers elder brother ANSWER: your sister in law........