Bellaquia' is a colloquial and somewhat vulgar term derived from "bellaquear," which means to engage in sexually suggestive dancing or behavior, often in a club or party setting.
In the song, the line "te voy a poner a bellaquia'" translates to "I'm going to make you get freaky/naughty." It's an enticing word because it hints at a night of passionate and uninhibited fun, making it memorable and relevant to the song's theme of a secret, intense relationship.
Rvfv's "TE ROBABA" is a super catchy track about a complicated, on-again, off-again relationship that's all about the physical connection. The singer knows deep down that this person isn't truly "his" – as he says, "Yo estoy claro de que nunca fuiste mía" [I'm clear that you were never mine]. But that doesn't stop him from "stealing" her away at night, even if she regrets it the next day. He's confident she knows he's her favorite in bed, though: "Pero en el fondo sabes que soy tu favo en la cama" [But deep down you know I'm your fav in bed].
It's a song about that magnetic pull you feel for someone, even when you know it's not meant to be serious. They fight, they get jealous, but they always make up in the bedroom: "Y siempre nos peleamos, pero en la cama arreglamos" [And we always fight, but in bed we fix it]. He even calls her kisses his "chaleco antibala'" [bulletproof vest] against the tough streets. It's a fun, no-strings-attached vibe, where the only thing that matters is the chemistry between them.