<human>: So something felt fishy between my girlfriend and her ex so today while she was showering I stooped down to the level of reading her texts. Sure enough she had been texting him up until about a week ago.

The conversation started with him asking her if she still doesn't masturbate and continued on in a very flirtatious manner. Mostly just flirting but reference to the fact he's seen her naked and that they used to sext each etc. She never directly said something so sexually related but had no problem answering and finding new ways to keep the conversation going. Don't want to overreact but it seems pretty straight forward. Not sure what to do when I talk to her about it. She is pregnant as well with what I assume for the moment is my child and I don't want the stress of expectations of that to affect how I go about addressing this.

Can you condense the text into a few key points?
<bot>: Pregnant girlfriend is flirting with her ex from high school. Not sure how much can be salvaged by communication or what this means about her in the long run