They co-parented for goodness sakes! What's more it worked out very well. Doria was always there for Meghan but for a times it was convenient for her to stay with her father. There's nothing unusual in that when parents divorce, they were quite amicable.
Thomas was a good and loving father, he adored Meghan, unfortunately he was manipulated by the media and then went too far, publishing a private, heartfelt letter from his daughter. I do feel sorry for him (not for his other daughter, S), I hope there is a reconciliation before it's too late, but he was his own worst enemy and he lied to Meghan. I thought everyone knew that.