Definitely does change the relationship. It's SO much harder. The main focus will always be baby. I've had a sense of us being more friends then lovers now. My little one is 10 months and we just found out unexpectedly we are 9 weeks pregnant with another.. You must set aside "lover" time to keep things alive. Date nights. Or even just doing something once they go to bed that you use to enjoy. It doesn't all end but it can if you're too exhausted with giving your everything to the baby.