I have a fwb is this ok

So I been with my FWB for a while now, at the beginning he would only have sex with me. And now he is having sex with 1 more girl. My question is, is it ok for him to be sleeping with other girls? And am I allowed to have sex with other guys? Or is that wrong? We are only FWB... does that mean I am a hoe? Lol.