Is this enough reason to break up with him?

So I am currently dating someone who called his ex's name during sex at one point. My name and his ex wife's name sound very familiar.

Also, we were doing the deed and his ex wife (divorced w a son from his ex) called while we were in the middle of having sex and he brushed me aside to pick up the call from his ex and reasoned out that he just really wanted to talk to his son. We have recently started dating. And for me it feels like red flags. Is this enough to break up with him?
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I broke it off with him. Thanks guys.
Is this enough reason to break up with him?
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