I put DD2 in with DD1 a week ago, prior to that DD1 shared with DS but felt he will soon be too old to share with her and wanted to have them all well settled before DD1 starts school in September. DD2 has never been a reliable sleeper (wakes once or twice a week and often for hours at a time) so I wanted her to get used to sharing with her big sister and hopefully that would help her sleep better. This worked with DD1 and my sister and I when we were younger. I realise it's very early days but so far DD2 has woken every night and every night she wakes DD1 who really really needs her sleep. One week in and they're both exhausted, especially DD1 poor thing. My question is has anyone else experienced this? If so what would you do, give it more time or take action?