Is it wrong that I no longer have feelings for my baby daddy but continue to have sex with him…

Is it wrong that I no longer have feelings for my baby daddy but continue to have sex with him because I don't want to sex with anyone else while pregnant ? 🤔 ( we're not together but we were for 4 years separated in September 2016 , i don't look at him in a romantic type of way anymore , it's just sex to me & I'm pretty sure it's just sex for him too )