Tinashe and Ben Simmons’ breakup is going from bad to worse.

The NBA star claims that his ex has been following him and showing up at the same places he visits with his new girlfriend Kendall Jenner, according to TMZ. He’s become so concerned with her “obsessive” behavior that he’s seriously thinking of beefing up security.

Tinashe has been spotted at the same clubs as Simmons and Jenner, and he doesn’t think it’s a coincidence. On Thursday, the Joyride singer showed up at Delilah, claiming Simmons had texted her. A couple weeks before that, she was at Poppy in West Hollywood at the same time as Simmons and Jenner.

Simmons believes that Tinashe has not accepted the fact he ended their relationship and has moved on with Kendall. He thinks that she has been keeping tabs on him for any possible chance of a reconciliation.

Tinashe told TMZ that Simmons was texting her as she left Delilah on Thursday night, but she ended up admitting that she lied and apologized to him.