Namely night duties. Bunch of small other stuff but night duties was the big one that launched this whole nightmare.
She was breastfeeding and I work 8-10 hours a day so while she was still pregnant we agreed that she would do all the night stuff so I could get rest for the long work days.
But after a while it became a big centre point for fights. At the time I was unreasonable and pissed off but I had posted here when it happened and between all the comments and my gf explaining it all I came to realize it was unfair for me to leave her exhausted when I could have gotten up to do some diaper changes. I’ve apologized for it numerous times and she said she forgives me for it.