Not necessary to attend for each adjournment. She can give power of attorney to her father also. Infact she can also file transfer petition seeking transfer of the case to the court nearer to her place.
When you are going for mutual consent divorce, where is the question of sending summons and missing summon dates. Your query is not so clear.
If it is mutual consent divorce, she needs to visit on the date of filing the petition and the date for consideration after six months. I don't think there would be any more adjournments.