How are your 2018 babies coping with any younger siblings they may have?!

My 2018 boy has a sister born in 2020, and another brother/sister due any day now...he can be so horrible to her and about her, it breaks my heart 😢

If his friends are around, he shuts her out from where they are playing and says she's not his friend and can't play with them. When he's playing at home alone, he likes to play in a separate room to her and screams if she comes near him when she just wants to join in and play! He will tell her she can only come in if she plays with something different to him, which of course is not what she wants!

He frequently says he doesn't like her to me, and that mummy and daddy are his best friend's, not her. And if he goes out somewhere without her, he has to point out numerous times that she isn't going with him 🤦🏻‍♀️

I'd love them to get on...but feel like he hates her! Is this normal?! Anyone else going through this and have any tips?!