Husband's ex wife telling me how much better her marriage with my husband was than ours...

My husband was married previously and has 3 kids with his ex wife. Me and him have been trying for a kid but miscarried last month so maybe I'm just more emotional. His ex wife clearly still loves and has said things to spite me. For example. My ring was about $800 but she told me that the ring he got her was 6k. I've spoken to my husband about it and he said he regrets spending that much on a ring and he never planned to do that again even if he got remarried. Another thing that happened is last week his ex recently sent him a message that he replied with a thumbs up. It was the anniversary of something very traumatic that happened to my husband in college and she messaged him asking if he was okay and then brought it up yesterday when she dropped the kids off and he said he was fine before she reminded him of the event. When he took the kids inside I told her to please not message my husband about things that have nothing to do with the kids. She said she was just checking up on him because she knows about this event. I said I know and he doesn't like talking about it. She said "Oh really? With you maybe. When we were together we would stay up late at night while he talked about it with me and I would hold him while he cried. I'm sorry that you guys aren't that close. Shame." My husband has told me about the traumatic event but he doesn't like talking about it. I did tell him what she told me and he said he regrets doing that to because that situation and trauma got weaponized when they split up and he learned to just not talk about it much. And he's healed and moved on anyway so he doesn't need to talk about it anymore. I know she's trying to cause issues in our marriage. She wants this. But would it hurt you to just feel like the second best wife? Cheaper ring.... He talked about his traumatic even with her but with me while he told me the event he doesn't like talking about it. She has said their marriage was stronger. Maybe it's my miscarriage making me more emotional but I'm starting to believe it...