Who could ever foresee, we used to stay up all night
At slumber parties, now I'm tryna rock this bitch to sleep
All the years we were real close, now I see his fears
Through her tears know she's wishing we were still close
The narrator never would have thought when they were little going to slumber parties that he would grow up and try to “rock this bitch to sleep” (kill one of his best friends). But he is not completely cold hearted to the friend, he just feels the need to kill him is a business move (“it’s not personal, it’s strictly business”). Since our narrator is suffering from the same issues as his friend he sympathizes with him, and would still like to be friends with him if they weren’t rivals.
Alternatively, the “bitch” that Jay has to rock to sleep could be the baby’s mama he kidnapped in the previous lines. He is either killing her to send a message, or trying to lull her into a false sense of security (“rock her to sleep”) so she is more willing to hand over the information he needs.
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