In Jain dharm there is no specific scriptural rule about “12va ka bhojan” menu or about adding sweet, even in case of death at age 48 or due to kidney failure.

A few clear points:

1. 12th‑day lunch is a social / family custom, not a compulsory Jain religious vidhi.

- Its main purpose (if done) should be simplicity, detachment (vairāgya) and remembering the soul with shubh bhāv, not show‑off.

1. Can sweet be added?

- Yes, there is no Jain prohibition on serving a simple, pure sweet dish on the 12th day. - Just keep it: - Pure vegetarian (of course) - Without eggs, alcohol, etc. - As simple and non‑lavish as possible.

1. Cause of death (kidney failure) and age (48 years)

- In Jain view, cause of death or age does not change the food rules. - The soul has moved on according to its own karma. Our duty now is: - Shubh dhyān, Navkār mantra - Pratikraman / Shānti pāṭh (if possible) - Dān and jiv-dayā in their memory

1. What is spiritually best on 12va?

- Keep the meal simple, without waste. - Avoid excitement, noise, and heavy celebration‑type feeling. - Do some pāṭh, svādhyāy, dān, and maintain inner shānti.

So, yes, you may keep a simple sweet in the 12th‑day lunch, but try to keep everything very saatvik, simple and with bhav of detachment and prayer, not as a big feast.