Why do couples “overcompensate” on social media?

Anonymous
I know an engaged couple that is going through an affair at the moment. He had an 8 month affair with someone on a dating app and she stupidly took him back.

Anyways, they’re trying to reconcile and she keeps posting on social media trying to make it look like they’re happy but they’re not.

Only a small number of people know about their situation and I get that it’s not ideal to air your dirty laundry, but why try to make it look like your life and relationship is great when it’s all fake? Why not just get off social media and actually try to fix your relationship?
Why do couples “overcompensate” on social media?
19 Opinion