Hindu husband can have live in without fear.

SC Judgement https://timesofindia.indiatimes.com/india/Couple-living-together-will-be-presumed-married-Supreme-Court-rules/articleshow/46901198.cms Live in has legal validity of Marriage, now so if you are falsely implicated by your first wife, you can have live in and after your death your live in partner will get your property not you first wife. hb498a