Hi, I can' t get a simple SOQL query to work, which tries to get all the contacts from a certain account.

Here is my sample code:

trigger triggerDNC on Contact (before update) 
{
    //Assign the context before and after the change into a Map
    Map<Id,Contact> newContactMap = Trigger.newMap;
    Map<Id,Contact> oldContactMap = Trigger.oldMap;

    //Loop through the map
    for(Id contactId:newContactMap.keySet())
    {
         Contact myNewContact = newContactMap.get(contactId);
         Contact myOldContact = oldContactMap.get(contactId);
		 
		 // myNewContact.Account.Name DOESNT WORK HERE ?
		 
		 List<Contact> cons= 
              [SELECT Contact.Name, Contact.Phone, Contact.DoNotCall, Contact.Account.Name FROM Contact
                   WHERE Contact.Id!= :myNewContact.Id
                   AND Contact.Account.Id = :myNewContact.Account.Id]; // this doesnt filter out correctly
                         
               for (Contact con: cons) 
               {
                   // con.Account.Name WORKS HERE !!?
               }
                
               update cons;
	} 
}

 I can't access myNewContact.Account.Name or myNewContact.Account.Id, so I can't find a way to get only the contacts from the same account as the one in the trigger.

Any help / feedback would  be greatly appreciated .. thanks.