There are many reasons why a cat might suddenly start calling for its mother. The cat might want its owner to play with it. Another possibility is that the cat is in heat, which typically manifests as meowing, lying on the ground, and seeking petting. The cat may also stick its rear end up in the air and rub against people.

The cat may be sick. In this case, it is recommended to take its temperature and observe whether the cat's appetite is normal. If there are abnormal symptoms such as lethargy and decreased appetite, it is necessary to take it to the veterinary hospital for examination in time.
A cat's meowing can also indicate affection; when a cat hasn't seen its owner for a while, it will meow to show that it misses them. When a cat is feeling unwell and wants comfort from its owner, it will become unusually clingy.