Descarado translates to "shameless" or "brazen". It's a strong, emotionally charged word used to describe someone who acts without any sense of shame or respect.
In the context of the song, the singer uses it to refer to her unfaithful partner, highlighting his audacious and disrespectful behavior of cheating on her in a 5-star motel and maxing out her credit card. This word perfectly captures her indignation and the audacity of his actions.
This song tells a powerful story of loyalty and betrayal. At first, it sounds like a declaration of unconditional love. The singer promises her partner that she'll stand by him through everything, for richer or poorer, in sickness and in health. She even offers to take out a bank loan if her own money isn't enough to help him. She reassures him, "I'm on your side."
But then comes the shocking twist. She reveals she said all this to a "shameless" man who cheated on her. While she was promising him the world, he was at a 5-star motel with another woman. To make matters worse, he did this knowing they were struggling financially at home, and he paid for it all by maxing out her credit card. The song contrasts her deep commitment with his selfish and cowardly betrayal.