https://www.reddit.com/r/relationships/comments/5s3uhv/my_wife_31f_just_confessed_to_me_that_she_kissed/

A woman makes out with her husband's brother, the top comments are very understanding and suggest he forgives her because she feels guilty. These hamsters are evolving, soon they will develop flight. (The top comment has +2000 upvotes and is clearly suggesting that the 19 year old brother is more at fault)

As always, imagine the reverse. A 31 year old man cheating with his wife's 19 year old sister, I wonder how understanding they would be then.