Could my "friend" be interested in my husband?

I hate to even come here about this, but idk what to think, say, or do right now. My friend and I planned a vacation, long story short, her mom tagged along and because my fiancé was in town, now husband as of almost a week ago, also tagged along on the trip. My friend and husband met for the first time on this trip, but apparently they hit it off so well that my aunt who I visited asked how long ago did my husband and friend know each other from because they seemed to get along so well. When i told her they just met 5 days ago she was shocked and honestly I tried to play it off as him being very talkitave, Which he is BUT she isn't. It doesn't help that I saw her checking him out and they kept looking at each other and at times I felt ignored. I want to think Im overreacting, but I also know my friend dates multiple guys at once so she doesn't has the same boundaries I do, also her mom literally told her on our trip to find herself a MARRIED sugardaddy and make him leave his wife? Oh AND About a month ago before my husband met my friend I had a dream that he cheated on me With HER! How can I start this conversation with my man who btw just left overseas for a yr and I wont be seeing him anytime soon??? HELP PLEASE My entire bday vacation was ruined by all 3 of them and I never thought my man would make me feel SO insecure about our love nor jelousy :'(