My (24m) best friend’s (24m) girlfriend (22f) is texting me every day, how do I approach this delicately?

Two weeks ago my girlfriend (24f) and 6 months pregnant and all of us went on a couples trip for a weekend. This was my first time meeting my friend’s girlfriend as they live back where I went to college. My friend let me know in advance he’s very into this one and that she could be it. My girlfriend and I also thought she was cool, and she got along with us great.

The first night we all exchanged numbers in case we got separated and just to make it easier to connect if we needed. She immediately for whatever reason took to texting me instead of anyone else. She texted me late that night just asking innocent questions about myself like she was getting to know her boyfriend’s friend a little better. It immediately struck me as a little weird, but I brushed it off.

It has continued that way. It has been two weeks and she’s still texting me at least once a day. It’s never outright crossing a line which is why i’m confused and not outright irritated. She’s almost exclusively talking about either future plans for us all to do together and how excited she is, or asking how my girlfriend is. She could be texting her but hasn’t one time.

I don’t want to make this a thing. My friend has expressed insecurity to me many times with various partners. He never liked introducing people to me and even before this meeting he joked that if she tries to cheat with me at least he knows she isn’t loyal. That really caught me off guard. Now i’m really lost at what’s even happening here. My gut tells me it’s weird but again she has never explicitly crossed any lines. She never came off as socially awkward or clueless. I’m ignoring 70% of the texts at this point but she always follows up.

My girlfriend is aware she’s texted me but not the frequency. She’s pregnant and I don’t need drama with her over something this dumb.

Is this innocent? Even if it is, how do I approach it? If it isn’t how do I approach it? I don’t want a rift with my friend and I don’t want to overthink something innocent like she’s just making an effort with us.