Brakes popping and overheating

What is your question?

Help! My husband had to drive my car for six months or so and when I was able to drive it again I noticed a popping type noise when I turned the car off. I noticed right away I needed to get my brakes done however when I asked him if he noticed it he said it had been like that for awhile. I'm very worried about the cost of the repairs. Does anyone know what all may need to be replaced? I'm trying to figure out the maximum repairs that may be needed as well as the cost. Thanks so much for any help!

What makes this problem better or worse?

I'm not sure since I don't know how long it has been a problem. My husband doesn't work on our cars, it's my job. I just know that brakes overheating means park the car until repairs are done.

How long has your 2018 Chevrolet Malibu had this problem?

More than a month