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Future is following up a monumental 2015 by starting 2016 on an ugly note. The rapper has taken to Twitter to blast ex-fiancee Ciara over the custody of their shared son, also named Future.

The Dirty Sprite 2 rapper does not address Ciara by name, but makes sure that his frustrations with seeing his son (whom he calls “babyfuture”) are made explicit. Future eloquently writes, “This bitch got control problems…”

Ciara, who has been dating Seattle Seahawks quarterback Russell Wilson, has yet to respond. Future and Ciara were engaged in October 2013, and their son was born the following May. The engagement was called off in August 2014.