why are the bhallas so happy?

Dont you guys think that the bhallas were beaming with joy to soon? I mean once adi is back,he is going to bring shagun back into the house or he might go and stay in iyers house? For how long are they going to keep repainting their house in order to keep airhead out? Once the paint dries, what excuse will they say and wont their laadla smell something fishy! This show has totally lost its brain😡