I've read various threads about co-sleeping and I know it's a very sensitive issue but would really like your advice. I've been in s relationship with my partner for 18 months. We regularly visit each other's homes. There have been instances where my DP's DD (12) will knock on the door and ask to sleep with us. At first I thought this was a one off but it happens most times when I visit to the point I've decided slept downstairs (we live some distance apart and only visit once a week at each other's home, twice a month at his house).I've tried to talk to my partner about this to find out if there's underlying cause such as nightmares, anxiety or just merely wanting a cuddle but I've touched a raw nerve. I'm not against co-sleeping but is this something that children will eventually grow out of? Should I accept things as they are? I don't know how to approach this so would value advice. Thanks.