My sons marriage

My son recently got married and as soon as they were legally married the battles began! His wife refuses to have any relationship with us even tho there wasn't even enough time to get to know us or for trouble to occur. This is just one area they are in an impasse! Her child told my daughter they argue all the time and my son told me its too much work. They can agree on nothing already! Miracles or deliverance are desperately needed! Thanks!