Is he thinking about cheating on me ?

So here is what is happening my husband has a friend of his that gets on my nerves she is 22 years old I am 20 and he is 23 she literally still lives with her parents and is a gamer just like my husband by the way . The only difference is that he lives with me . But now a days I am a little insecure . I wanted one of my friends to come to live with us and her name is Jessie and she is my age the situation would be a polygamy situation because my husband alredy made it clear that he is okay with having 2 girls . And I was ok with that as well . But then Jessie can't come to live with us and so he befriended this 22 year old girl out of a game . Now every morning they talk and he thinks she can be some help financially as I currently dont have a job . He says I am his first lover and no one can be above me but IDK usually they never talk about their relationship only games . But yesterday he made a comment like : " I dont want to lose you girl , but I still think Karmen should come down here " Karmen is her name btw. Now it got me thinking Does he wants a relationship with her or he just wants her for her money ? And plus because of their stupid games they talk in pirate speech so is blowing me off that he is calling her deary and sleepy head