Remordimiento means "remorse" or "regret". It describes a deep, painful feeling of guilt over something you've done wrong.
In the song, Natti Natasha sings the powerful line, "Y hoy me come el remordimiento" (And today, remorse is eating me up). This dramatic expression paints a vivid picture of being consumed by guilt, making it a memorable and advanced way to express this intense emotion.
Dominican singer Natti Natasha flips the usual infidelity drama right on its head in "Quién Sabe". Instead of crying over someone cheating on her, she is the one coming clean. Right from the start, she begs her secret lover, "No me mires así, que me duele verte llorar" ("Don't look at me like that, it hurts to see you cry"). She drops the heavy truth that she already belongs to someone else ("soy su mujer" / "I am his woman"), admitting that pure guilt is eating her alive ("hoy me come el remordimiento"). She even confesses to lying when she swore her main partner was "agua pasada" (literally "water under the bridge," an idiom meaning ancient history).
The real twist is the wild paranoia that hits her while sneaking around. The title question, "Quién sabe" ("Who knows"), turns into an anxious spiral. Every time she holds this side partner, she wonders if her husband is doing the exact same thing behind her back: "Si mientras yo lo veo durmiendo él ya tiene a otra / Besándolo suave, Dios, así como hacemos nosotros" ("If while I watch him sleeping he already has another woman / Kissing him softly, God, just like we do"). It is a messy, selfish, deeply honest track about feeding your own ego ("alimentar mi orgullo") and realizing your own games might come back to burn you.