Am I wrong for telling my boyfriend not to do things for his child’s mother that’s unrelated to there child?

My boyfriend lied to me and told me to wake him up 5 In the morning so he could take his “cousin” to the airport but then a few days later he told me he was going to have his child for longer than he usually has her because his child’s mother was out of town i figured out he actually took her to the airport and not his cousin and I told him she shouldn’t be calling him to do things for her that’s unrelated to there child because they are not together anymore and he says I’m over reacting am I wrong?
Am I wrong for telling my boyfriend not to do things for his child’s mother that’s unrelated to there child?
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