Conversation so far:
How was Wilhelm II, German Emperor in handling foreign relationships?
Wilhelm II, German Emperor's most contentious relationships were with his British relations.
Did Wilhelm II, German Emperor have many foreign relatives?
As a grandchild of Queen Victoria, Wilhelm II, German Emperor was a first cousin of the future King George V, as well as of Queens Marie of Romania and others.

Question: Was he very mean to these relatives?
Self-contained rewrite: Was Wilhelm II, German Emperor very mean to his relatives?