<human>: Can you provide a brief overview of the text?

Hey r/relationships! 

So I'm really good friends with a male coworker and just as friends do we hang out outside of work. Just a little background, this coworker and I have never dated. Recently he's been dating this new girl and for some reason she feels I'm a threat. 

Yesterday I get a voicemail from my coworker and his girlfriend. It was pretty harmless as all of us coworkers had been texting him and he called to say hi and asked me to call him back. After I listened to the voicemail I received a text message from my coworker basically saying this new girlfriend of his is getting jealous and she's heard a lot about me. She wanted to make sure that I knew that they were serious, that we don't flirt or hang out one-on-one and that I respect their relationship.  At first I laughed it off as her being crazy pants and I was going to hang out with my coworker if I wanted. 

Then the girlfriend called me off of his phone and left a voicemail. She first complemented my hair, which, golly what a nice person, and then proceeded to reiterate what the text message had said. She said that she was insecure and jealous and that they are super serious he just hasn't found the opportune moment to make it official. MEANWHILE my coworker is sitting next to her while shes recording this voicemail. After marking her territory, she then concluded the message asking my coworker "How much do you like me?, Are you my baby?, Who do you adore? Now say it louder." 

I have no idea how to bring this up to my coworker, he's been avoiding me since it's happened. I'm trying not to be a bitch, and say What the fuck is wrong with your crazy ass girlfriend?
<bot>: Crazy girlfriend of a coworker I've never dated is calling me and asking me not to hang out with him.