Sometimes I imagine infidelity in marriage to be a bit like if you and your best friend moved cities and they got a new city best friend and the first time you go to visit, you're upset and sad and jealous and you hate whenever their name comes up
But then maybe you go away together- just you and your best friend and you have an amazing time and bond and you remember why you're best friends and new city best friend doesn't even come up once and after a while when new city best friend comes up, you don't even care anymore- sometimes new city best friend doesn't even come up for weeks
Then one day, you ask 'I haven't heard from new city best friend in ages' and best friend says 'yeah I don't know, we don't really talk anymore'