This was an enjoyable way to spend an evening but was certainly not one of Meryl Streep's better films...and I love Meryl Streep's work!
Why would she consider taking her husband back after all those years when he still seemed to have so few morals? If it feels good, do it, no matter whom it hurts...his current wife or even children involved.
I think John Krasinski was very funny in his role as future son-in-law.