please help..

hey ladies, I need some advice. my husband has been texting another female quite alot lately, while he was in the shower I saw she texted. being curious I looked through the texts a little bit and saw that he was saying how he wanted to kiss her, and cuddle with her. I asked him about it and he says "it was a joke" and he didn't mean anything by it. should I still be angry? (this isn't the first time hes flirted with other women)