Ask her to give him sometime.. and talk to him later on. as they are married now, the result of sudden desicion will harm both of their lives. so must be patiant. he is completely wrong. but if she go after this problem and troble him, he might think of it a lot....and sometimes he will also call that girl ...
and she can call that girl and shout..and tell her not to interfer to their lives..
best thing is to give him sometime and explain how the same thing happend to her and how she feels.
Tell her not to allow outsiders to distoy their happyness...