Oh MH, I wish I could remember the things I did with my kids as each new bub came along, but I'm so used to having my hands full, that I must be overlooking something!

I do remember getting DS1 a baby doll while I was pregnant with DD, so that he could get used to having a baby around .... teaching him to be gentle etc before she arrived (the doll ended up being bigger than DD ) So when I was feeding DD, DS1 was "feeding" his baby ... but he was a bit older than yours ....

He liked to cuddle up to me while I was feeding too ... actually, all three of the eldest have liked to cuddle or lay their heads on my lap while the baby has been feeding (successively of course! The eldest wouldn't do it now!)

All I can say is that it does get easier! I can now feed DS3 relatively drama free, but he is nearly 9 months. I think like some of the others have suggested, try to make a time that is "you and DS1" time, while the baby is sleeping. Yes the house may look like a bomb has hit it for a while (heck, mine still does! LOL) but IMO it's worth it for your eldest to realise that he hasn't been "replaced" so to speak ...

HTH xxx