Desvelos refers to sleepless nights or wakefulness, often due to worry, love, or anticipation. It's a more evocative and poetic word than simply saying "no dormir" (not sleeping).
In the song, the lyrics mention "A la que hiciste menos con tantos desvelos / Esperando tener noticias de ti." This highlights the emotional toll and sacrifice of the person waiting anxiously, emphasizing their deep concern and dedication.
This song, "Ella," is a really interesting look at a relationship from both sides. Daniela Calvario starts by singing about "Ella" [She], the woman who's always there, waiting and forgiving, even when her partner isn't. She's the one who calls, but he hangs up, and he lies to her, but she doesn't get upset, even if she suspects something. Daniela sings, "A la que sientes segura, pero ya no te dura" [The one you feel is secure, but she won't last anymore] because she's getting tired, and he's not noticing. She's the one who's always worried about him and has forgiven all his mistakes.
Then Charles Ans and Neto Peña jump in, and it feels like a bit of a wake-up call from the man's perspective. Charles Ans admits, "Llevo algunos días algo raro y roto" [I've been feeling a bit strange and broken for a few days] and notices she's smiling more in other photos. He wants to make things right, to see her happy and beautiful. Neto Peña's verse is a heartfelt apology and a promise, saying, "Nunca me has fallado, nunca me has faltado a mi lado" [You've never failed me, you've never been missing from my side]. He calls her his present and past, promising to give her the peace she deserves. It's a song about taking someone for granted and the realization that they might not be there forever, even if they're incredibly patient and loving.