I think it is going to look different for everyone but I think if you are already married or in an established relationship it isn’t going to look a lot different than before. It’s not a fairy tale. We still have jobs and family and obligations that don’t allow us to live completely centered on the D/s at all times.
Our kids may notice I am more attentive to him. At night I am spending more time with him before he goes to bed. There was a very odd look given the other day when I got him out a tray and brought his food to him. We may get more groans and “get a room” comments around our extended family as we are even more affectionate. We are still us just closer.
The real difference is on the inside. I have always loved this man but our connection is deeper. I feel it like a current running between us. He occupies most of my conscious thoughts. I want to please him. I feel more at peace. I am more me. I am his mind body and soul 24/7.