A rich businessman having an extramarital affair gets involved in an accident and unwittingly kills a young boy by drowning his car even though though the boy was alive though badly injured. He gets blackmailed along with his mistress and while paying off the money in a hotel the mistress gets murdered and the man is found guilty. The hot shot woman lawyer representing him gets the full story out of him and in a twist, she is the mother of the dead boy in disguise
Contratiempo (2016)
https://www.imdb.com/title/tt4857264/
Yes yes thank you so much
Solved!