Baby shower invite question

Remi • 🇺🇸. Baby girl born 12/21/18 🎀

So I ran into an old friend an Walmart the other day and I was like “will you be able to make it to my baby shower?” And she goes “yeah but Cody might not!” (Her bf). Uh I never indicated it would be a co Ed shower and I don’t want it to be... how do I indicate that on the invite? That men arent allowed? I’m bugged she even assumed haha I guess they are popular now.