My 2 and 6 year old daughters are very close and adore one another. At the moment I'm 20 weeks pregnant and co-sleeping with 2 yr old dd who I'm in the process of night weaning which is going surprisingly well. 6 yr old dd has a bunk bed but has asked if she can share the bottom bunk with her sister when she moves into her room. 2 yr old is obviously used to sharing a bed and so would probably prefer to sleep with her sister than alone. Aibu to let them share a bed?