My DD just turned 1. In the past couple of weeks she's been getting very jealous and aggressive towards my 4yo DS.
For example, if he is sitting on my lap for stories, sometimes she will scream and try to push him off.
If he's annoying her, she pushes/hits/screams and also bites him deliberately. For example, the other day he was looking at one of her books and wasn't letting her see/have a turn. I was trying to get him to share better with her when she launched herself at him and bit his arm really hard. He was really upset.
For context, DS is generally pretty tolerant of her, likes to play with her a bit and isn't generally physically aggressive to her. He does also show some jealousy - he often demands to use her things or to have first choice/the nicest/biggest snack etc and will also get loud/silly/naughty if she's getting attention and he isn't.
I'm honestly a bit unsure how to deal with this, which sounds silly as it's a pretty basic sibling issue. But I was an only child, so didn't have to navigate this stuff myself.
DS is generally a high energy child who is used to having lots of 1:1 attention from me and DH, whereas DD is a lot more laid back and already enjoys pottering around playing by herself (DS could not do this at all until nearly 4). So when I was on mat leave I mostly focused on doing activities with DS when he wasn't at nursery, with DD tagging along in the carrier. Now she's not a baby any more, I think things need a bit of a re-think!
Any tips? I don't want DS being bitten/pushed around. But I also feel like I can already favour him with my attention/input after DD's basic needs are met!