Ex text?

So a while back my boyfriend received a text from his ex while we were talking. They broke up over a year ago, but she still occasionally texts him. She blames him for her inability to date (he broke up with her). I understand some people need someone to blame, but she's a grown woman (27+).

My problem is, he still has her number in his phone. I didn't mention it, but that bothers me. Am I out of line? I cut off all contact with my ex's. I feel that's natural and healthy. Should I ignore it, or casually mention it if it happens again? I don't want to blow it out of proportion.

Thoughts?
It's fine, you're overreacting
Vote A
That's not okay for him to talk to her- talk to him about it if it happens again
Vote B
It's not a big deal, but casually mention it if it happens again.
Vote C
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Ex text?
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