Has the Christian definition of sin been evolving since the Christian scam began?

Divorce used to be a sin but now it’s so socially accepted it’s kind of boring, right? Sex before marriage used to be a sin back in the days when people were getting married at 16, but now that people don’t get married till mid to late 20s, sex before marriage is socially accepted, right? My point is, there is no ultimate definition of ‘sin,’ right? It changes along with society, doesn’t it?