is it normal for a married person to keep up with an ex?

[Dee]

No, but some exes never let go completely and always check in to see how their former love is doing. Which, by the way, is selfish especially if the nosy, intrusive ex was the one who broke up with the person. I think the fantasy was better than the disappointing reality of how well they be better off without the other. AND the most beautiful part is when they see they've been replaced. It's well deserved in some cases, especially when the person left their ex behind believing they could do better and get to see the rejected persons life went on and their happy. It's the beauty of Karma! But, if it was amicable, then they shouldn't be looking back at all and usually don't. Hope that helps? Good luck