Expecting our first, due in November. DP already has a daughter, 6 - she’s lovely, however still doesn’t know how to say please and thanks even though DP tries to enforce and encourage it. She doesn’t listen, answers back and when she’s told off (even in a very mild normal parent telling child off way) she cries and tells her dad she hates him. She plays her mum and Dad against each other and makes things up about people (me included. I provide nothing but a supportive, kind shoulder to lean on for her, but she still told her mum I smacked her bum - I wouldn’t dare!). I have no idea why she is disruptive, she can be very spiteful at times. I care for her greatly and feel guilty for fearing she will rub off on our DC.
Am I utterly unreasonable for feeling this way? Do kids tend to be entirely different? I feel manners are so important and think children learn a lot from their siblings.
I’ve never had children before so maybe I’m naive to feel this way...
Ideas?