Yvonne hides the letters

With one of the letters missing, Yvonne pretends that she has destroyed them all and locks them away for the time being.

Meanwhile, Iolo has some bad news for Colin about his room.

---

Gydag un o'r llythyron ar goll, mae Yvonne yn esgus ei bod wedi eu dinistrio i gyd. Ond mae'n eu cloi yn ei chwpwrdd yn ddiogel am y tro.

Mae gan Iolo newyddion drwg i Colin am ei ystafell.