Obviously if one contemplates Mary to any depth, considers her situation from a worldly POV, it would be horrendous to do whatever they did in those days. But still we don't know how God would deal with the woman.
Only the ancient churches and a few fundamentalist Protestant churches teach it is wrong. Some unbelievers think it is wrong; what they base it on I'm not sure but good they do.
“The bible doesn’t explicitly say it’s wrong or murder.”
The 6th commandment. We all know that’s a life.
“Thou shalt not kill”. Quite unequivocal.