In some ways I'd say it's even my sister's fault. She pushed her dp into engagement and marriage and there was a lot of chat about how tragic it was to be unmarried in your 30s (as I was at the time) and how 27 was the best age to get married. I never really got the impression she even liked him, it was just all about having the wedding.
3 years later the wheels have came off and she's so angry and so embarrassed. If she even said 'I was too young and I made a mistake' I'd be right there with her but she's still vehemently blaming the poor bloke.
She's moved back in with our parents and it's so draining. I'm having to distance myself from them all and just hope they all come out the other end.