The missing ring / Happy birthday to you!

Lele decides to give Alice the ring he bought her some time ago, but it seems to have disappeared into thin air. Meanwhile, the relationship between Cettina and Giacinto seems definitively over. It's Lele's birthday, but the whole family pretends to forget about it so they can throw him a party. Meanwhile, the doctor's relationship with Alice is kept secret, but how long will they be able to live in hiding?