Some advice please

Help them play together. Have the baby give her a gift when she comes to meet them in the hospital. Call it her baby brother or sister as much as possible.

When my daughter was 8months to when she was a year and a half I baby sat another little kid. She would sometimes get jealous. She got used to me feeding and holding another baby though. I had my second a few months after I started working for them and she has been doing great. Sometimes she is jealous but I just make sure I give her love too. When I feed baby sister she plays on the bed next to us or cuddles us. When I put baby sister to sleep she rocks in the rocking chair with us. She loves to be a helper and is usually very sweet and kind

I got pregnant with my second baby two months after I gave birth to my first, they are now 20months and 8months and they are both very loving to eachother, just nurture the kindness, don’t get angry if they struggle to share at times, always stay happy and calm, smother their good moments with compliments and reinforcement and they will love eacjther and their dolls/toys/pets so much (sibling rivalry will be unavoidable to some extent 🥰)

She's 5 months old? She doesn't understand "mean." She'll be a totally and completely different child by the time you have another. Raise her to be gentle and kind, reinforce what that means, set limits and boundaries, and realize that she is going to be a toddler and toddlers naturally go through clingy phases and tantrum phases and that's normal, you just don't leave them unattended together until they're much older, which is easy to do because you wouldn't leave the youngest unattended until they're much older anyway, so they're never or rarely going to be totally unsupervised.

How a 5 month old baby behaves is in no way indicative of what their personality will eventually be. That's determined by a mixture of genetics and environmental influences.

I had my second baby when my first was only 11 months old. There were two incidents where I was alone with both babies (husband ran out to do errands) and my first had a total meltdown about me feeding the second. Both times, I had to stop feeding the baby and hold my 11 month old. By the time my hubby finished his paternity leavemy first baby started to warm up to second. I tried to always keep them together and get them on the same schedule. They’re now 18 months and 7 months and so sweet together - they hold hands and my first is super gentle (we did have some scratches and hitting, but we worked with our first on how to be gentle). I can’t wait until they really start to play together. It takes time but from what I read, really focus on your first and try to incorporate them with diaper changes, feedings, etc. so they feel included and like they’re helping. It takes time, but you got this!

Sorry, just want to add… give yourself grace and be flexible. I was totally against screen time. That went out the window when I had my second. I put ms Rachel or bluey on if I have to feed the baby and my toddler isn’t playing lol I felt so guilty in the beginning but now it helps me keep sane.

They will love each other! Each one on one time to each and be intentional! They will be blessed to have each other

I think at 5 months it developmentally appropriate for your baby to be jealous of others.

Id worry about this if it comes up. Wasted energy thinking about it now.