Friend Advice

I need some advice. I have this female friend I’ve know for about 5 years. We met after I was married in 2014. We did not meet through my ex husband. We’d talk regularly, but we became closest after I got divorced in 2016. By close I mean, texting regularly, dinner a couple times a month, getting our nails done together once a month etc... I told her everything. I told her my feelings and how I was getting through my divorce (my ex and I were together 5 years before getting married). Anytime I had a date, new jobs, my frustrations with knowing my ex had a new girlfriend before the divorce was even finalized. I told her everything. Since the divorce 3 years ago, my ex has gotten remarried and just had a baby with his new wife. I have no ill wishes for the baby or the wife. I don’t think highly of my ex, but I don’t wish them ill. (I’m a big believer in karma. Honestly, I miss his mom more than I miss him. My issue is within the past year, it seems like she’s been talking to him quite regularly. Even yesterday online she asked when she could see the baby. In my mind, knowing what I went through the past few years, i feel disrespected. When I first found out she was talking to him, she said ‘he seems to be doing really well and seems like his new wife is good for him and he treats her better.’ Like I needed to hear that. I started to wonder what she has told him and if I can trust her not to pass things along about me or my life. She was my closest friend while I was going through the divorce. Now I don’t know if I can trust her. Opinions please! Am I being unreasonable or ridiculous? I know she is an adult and can make friends with whomever she wants, but it still hurts.