My ex husband has a new girlfriend of around 3 months. This is one of many girlfriends since we split. He took it upon himself to introduce her to DS 12 on his weekend. She now has his mobile number also and has messaged him (about his dad etc I am keeping an eye on messages). I overheard a phone call with DS, his dad and her and at the end of the call she said "Bye, love you lots" to our DS. AIBU or is that just a bit weird