Search Results: flirting with strangers

So here are some specific details.
- Together almost 2 years, not married
- You have proof with screenshots
- They had intentions of sending pictures because your S/O asked for pictures
- The woman/man they flirting with lives in another state
- The conversation happened a week ago and they stopped flirting but you S/O didn't tell you about this or expect you to see it
- They only did this with one stranger
- You know your S/O would break up with you over this but they don't want you to break up with them.
- They are old enough to know this was not only wrong but a calculated decision
- They boast about how they are loyal and expect you to be. And don't trust you, making you take pics when you are out because they want proof you aren't cheating. But here they are..
- They told you it's not a big deal and they made many different excuses, then eventually apologized

Personally, this is like a crack in a mirror. Weakens the integrity of the person, weakens loyalty, weakens trust. It's an opener for cheating. This is how it starts out. With just one person small flirting then it builds up over time with more people and pictures. This is a red flag. I understand if they want to break up because the S/O shoulda known better and don't have time for games. But I believe most people will say it depends or they will work it out since it's just the beginning.

Is focused mostly on career.
Never dated, never had sex, never been in a relationship.
Doesn't flirt, doesn't do stupid things like nudes and sexting, etc.
Doesn't talk to strangers easily in real life.
Doesn't have many friends, just 2 or 3.
Is introverted, is calm, is shy.
Is vegetarian, is a cat person, comes from a very religious family.
Would never engage in sex without an emotional connection (like one night stands, etc.), would never have threesomes.
Would never drink, never smoke, never take drugs (except for health reasons), would never go to strip clubs, bars, etc.
Would never swear, and say words like sh*t, etc.