Boyfriend Probs

So my boyfriend recently said his ex's name while we were having sex. But it was during the sweet, tender making love kind of sex, not during the hot, dirty and sweaty kind of sex. I'm surprised at how not mad I am. At him. Should I be more upset than I am?? Most girls would throw them out on the lawn and tell them to leave and never come back. Instead I held him while he cried. Is that bad??