Remember when you were dating someone. And every night was spent together, whether at their place or yours. Finally one day you came up with the idea of moving in together so you could split the cost of living jointly instead of paying for two separate places.
That's sort of how we came up with the plan of moving in with Vlado, Joe's dad. Along with V's house being plenty big enough and him endlessly asking us to move in with him, it made the most sense for us and for V.