Gee i'm gonna have this dilema too as Ella will only be 22months when bub #2 arrives. I refuse to buy another cot - and am not prepared to do the bassinette thing again (this next bub is going straight in the cot) so i will have no choice but to put her in a big bed. I really hope she's gonna be ok. I wanted to make the transition a few months before bub arrives so she is used to it but that's gonna mean she'll only be 18-19 months!????