It's raining. Husband and wife were on the way home. Husband was driving while the wife was thinking hard. Suddenly..

Pottttttttt

H : Did you fart?

W : Yes.

Husband lowered the car window.

W : It's raining outside.

H : It's not a heavy rain. 

After a few seconds, husband raised the window.

Pottttttttt

H : Did you fart again?

W : No, it's burp.

H : I don't trust you.

Husband lowered the window again.

H : What did you eat?

W : I had watermelon juice while waiting for our food ready. That's why....gassss.

H : You're enjoying your drink while I was in the car waiting for you.

W : Yup. Bestttt.

Husband sighed and his wife smiled.