We can add return this.owner in set method?

class Pet {
  constructor (animal, age, breed, sound) {
    this.animal = animal;
    this.age = age;
    this.breed = breed;
    this.sound = sound;
  }
  speak () {
    console.log(this.sound);
  }
  get activity () { 
  const today = new Date();
  const hours = today.getHours();

  if (hours > 8 && hours <= 20 ) {
    return 'playing'; 
  } else {
    return 'sleeping';
  }
}

set owner(owner) {
  this._owner = owner;
  console.log(`setter called: ${owner}`);
  return this._owner; //IT WORKS without GET!!!!!!!!!!
  }
}

class Owner {
  constructor (name, adress) {
    this.name = name;
    this.adress = adress;
  }

  set phone (phone) {
    const phoneNomilized = phone.replace(/[^0-9]/g, ''); 
    this._phone = phoneNomilized;
    return this._phone;
  };
};

const ernie = new Pet("dog", 1, "pug", "yip yip");
const vera = new Pet("dog", 8, "border collie", "woof woof");

ernie.speak();
vera.speak();

//ernie.owner = "Asley";
ernie.owner = new Owner("Missa", "123 Marin Street");
//ernie.owner.phone = '23423-4324(32)'; //if we uncomment this line, we get an error without get method!!!!!!
console.log(ernie);