did you replay Final call as well? Im not sure what went wrong. Altho opening the sex scene isn't a clear indicate of 50 points. A clear indicate is Locks reaction to Keyes being what he is in the Asylum. If he freaked out he is below 50, if not it is above. If the ending is still stuck in Darkness, try this https://steamcommunity.com/app/1343220/discussions/0/4336358006696848283/
sorry if it still doesn't help :')