There are times where couples think their relationship is indestructible, that it can survive absolutely everything. But the biggest test which is moving in together can be fatal, because that is the ultimate test that can show that you are maybe not one for another.
Sometimes it' not partners bad habits that can get on your way, it can be your parents who don't agree with you.
Not to spoil everything in description, everything about moving in together with your partner, is it early, and even good for relationship, check out with B.