Mia, being the wife of Jacob (who is Clara's brother), is Ethan's aunt by marriage. Mia does not have a blood relation to Ethan but is related through her marriage to Ethan's maternal uncle. Ava, as the daughter of Clara and Oliver, is the niece of Oliver's sister Sophia. Sophia's daughter, Emma, would then be Ava's cousin, as their mothers are siblings. Emma and Ava share a direct family connection through their parents being siblings.
Clara is married to Oliver, and they have a son named Ethan and a daughter named Ava. Clara's brother, Jacob, is married to Mia, and they do not have any children. Oliver's sister, Sophia, is married to Lucas, and they have a daughter named Emma. How is Mia related to Ethan, and what is Ava's relationship to Emma?
Make your response very short.