[Zaimahi]

A man was engage to a women physically (weather intercourse or just touching, kissing etc) by his wish or forcefully but then he feel guilty and ask forgiveness to Allah then later after years he get married to her daughter and start living together and had kids too and he and his wife's mother seek forgiveness and forget everything and hide it from his wife, now the question is weather this nikah valid or not, when they have kids too?