When Dorothy found out she was going to share the carriage with Miss Magdalene she was angry. She had deliberately let a few people notice her relationship with the prince. She even had him prepare a carriage for her. She never expected Miss Magdalene would dare come and join her.
She wanted to complain to the crown prince but Edward was not stupid.
Although he cared about her a lot and wanted to make her his official mistress, he also understood that he could not take that step now.
If the king was still alive after he returned to royal city, he would have dared to take her in as a mistress but with the king dying suddenly he could not give others something to use against him. So, he did not dare interact with her privately on the road back to the royal city.
