I’m a single parent and I’ve been dating a single dad. He sees his DC every weekend, however he does want to see her more but apparently his ex is being difficult. Yesterday was his DCs birthday so he went to his party and obviously saw his ex was there. Since then he’s been ranting to me about his ex saying she used him to have a DC and then pushed him away, kept him from seeing his DC for ages and talking about his past with her. Is this a red flag that he is ranting to me about his ex?