
You will know who the 'Judas' is just by body language, word choice, and the always concerned what your husband whereabouts are.
One of the body languages could be the constant flirting, light touching which normally goes with the ongoing giggles and laughter, and the famous eye balling. Quick sneak glances or stares at your husband are just a few of the signs. Also, the constant being in his face is another dead give away your female friend may likes your husband.
Word choices are also possible red flags of a female friend liking you husband. Subtle hints or messages in conversation with your husband are the big and obvious crush signs. Wives, please do not be naive! Take notice of what my be going on. Just keep on eye out. I understand somethings may not always appear of what it seems, however just keep note of what is going on.
Last by not least, when the female friend is always asking about your husband. His likes, dislikes, questions of "is he home?", what time does he get off, personal questions and the list goes on. Wives can I suggest something. Be VERY reluctant of giving your husband's cell phone number to a female friend. Things happen or innocent reasons of her having his number may occur, but please, by all means, avoid it! This could hit you in the face later down the line. I'll give a quick scenario: Girlfriend is going through, ie pain, breakup, lost of..., or just need someone to talk to. She calls everyone on her contact but no one is available (We all have had those days). She's desperate. She sees your hubby's number. She calls, they talk, he soothes her over, and they both enjoy each other's conversation. Later, he may call to check up on her or she may call back thanking him for giving his time and concern. A little innocent bond is now made. Later, possibly you got in a fight with the husband. He wants to vent and talk to someone so he calls "her". She soothes him over assuring him it's ok. Next thing could happen, he gives her subtle compliments and vice versa. To make it short, feelings may start to surface and need I say more. You can play with the story, doesn't have to happen like that, but you all know where I'm coming from.

When in the public eye and a female or even a friend is constantly flirting with your husband, STAY CALM. I cannot stress this enough. You don't want to make a fool out of yourself. You don't want to look insecure either. That's a turn off. Stay cool, calm, collective and CONFIDENT. It's best not to go running over to them like a wild ragging bull with fear in your eyes. All that is going to do is give the other woman more ammunition to be mischievous, because she will play on your insecurities. Now see, this is were your appearance comes into place too. Many posts ago, I did A Wardrobe That Works. At least you will be looking hot and feeling confident if/when approaching your husband.
It is your husband's responsibility to address the female/friend and set that boundary. Now this is the part we wives have no control over. The only thing you can do at this time is to somewhat wait it out and PRAY for God's grace, peace, and His mercy not to slap her. If your husband thinks that there was nothing wrong with him entertaining the flirtatious female or friend then you are going to have to pray and keep your cool (in the public eye), cry and vent later.
Overall, it's disrespectful to you. Whether if your husband doesn't see anything wrong or thinks it's all fun and games, if he's a real man of God, then he will respect your wishes and have that boundary set up. The two of you must agree. Would he like it if it was the other way around? Like I thought!
Golden wives, all I can't address all the possible scenarios of this situation. However, the greater One is inside of you. Ask the Holy Spirit for guidance and wisdom. If you are in a public place, quickly go to the bathroom and say a prayer. God will ANSWER! God will intervene on your behalf where you may not have to do or say anything.
TESTIMONY
FYI: I remember the Lord instructed me to HUG the female that was flirtatious and trying to get with my husband (mind you she was a Judas, ehemm I mean, 'friend'). I fought and fought God on this. After a while I was having dreams of me hugging her and wishing her well. So I knew what I had to do. Sure enough, a week later, we ran into each other at Dunkin Doughnuts and I wanted my emotions to get the best of me, but instead I gave her the biggest bear hug ever. She was surprised and confused looking, yet she had somewhat of shame on her face. Oh yes, it was an awkward moment, but I felt at peace and forgiveness came in my heart towards her. It brought healing and closure to me and I felt like the bigger/better person. Now she tries and invite me to her things, converse, you know, build that friendship up again. I still take it slow with her, but God knew what He was doing. Thank You Jesus! Are we not to walk in unconditional love?