The Carter brothers’ relationship has been rocky over the past few years, but the drama seems to have escalated, as Nick revealed via Twitter on Tuesday that he and his sister Angel are seeking a restraining order against Aaron.

“In light of Aaron’s increasingly alarming behavior and his recent confession that he harbors thoughts and intentions of killing my pregnant wife and unborn child, we were left with no choice but to take every measure possible to protect ourselves and our family,” he wrote alongside the hashtags #mentalhealth, #GunControlNow and #GunControl. “We love our brother and truly hope he gets the proper treatment he needs before any harm comes to himself or anyone else.”

#mentalhealth #GunControlNow #GunControl pic.twitter.com/q280ClqyjI

— Nick Carter (@nickcarter) September 17, 2019

Aaron responded to Carter’s announcement in a series of tweets, writing, “So my brother just got a a restraining order against me. And I was just served lol.”

“Take care. @nickcarter we’re done for life,” he continued, before adding, “I haven’t seen him in four years. And I don’t intend.” He followed up with a video from the House Of Carters series in which Nick “tortured me as a child.”

The news comes just a few weeks after Aaron’s latest Twitter roast of his brother, accusing him in since-deleted posts of leaving his family behind and claiming that he’s never met the Backstreet Boy’s son.

So my brother just got a a restraining order against me. And I was just served lol

— Aaron Carter (@aaroncarter) September 17, 2019

Take care. @nickcarter we’re done for life.

— Aaron Carter (@aaroncarter) September 17, 2019

I haven’t seen him in four years. And I don’t intend.

— Aaron Carter (@aaroncarter) September 17, 2019

I am astounded at the accusations being made against me and I do not wish harm to anyone, especially my family.

— Aaron Carter (@aaroncarter) September 17, 2019

All I ask is for my family to leave me alone. This is blood. Not love. I will never be around you and I don’t want to be around you. I am the one who said I’m done then you send me this!? Ok. Stop trying to get me 5150’d before I file a harassment suit myself nick I have the $

— Aaron Carter (@aaroncarter) September 18, 2019

LEAVE ME ALONE. FOR THE REST OF MY LIFE. IM BEGGING YOU. PLEASE. I haven’t even seen you guys and nick you bullied me my whole life. And tortured me as a child. And everyone knows it. ITS BEEN PUBLIC. and now you’re scared of the truth. pic.twitter.com/kd7nIF49PI

— Aaron Carter (@aaroncarter) September 18, 2019

This article originally appeared at Billboard.