I am also looking forward to this episode with great anticipation. On the last update, we saw things going a lot better... especially the relationship between Marty and Katherine. I hope things have only continued getting better.
At the beginning of this series there was a lot of discussion about how the baby would rip the family apart but, instead, seems to have helped glue the fractured parts together. Also, of course, credit Dr. Phil... I feel strongly that, if Erin had divorced Marty before the show, it would have been a bitter, nasty divorce and that the girls would not have had a relationship with their dad. Now, whether the parents stay together or not, I feel that the girls will both have a relationship with both parents, which is the best outcome for them, isn't it?