Co Sleeping

My 9 month old (turns 10 months on the 18) had been sleeping in her own crib since she was a newborn, we co slept in terms of her bed being next to ours. Shortly before she turned 9 months, she's been wanting to sleep with us and it's been happening now for about a month.

Has this happened to any of you? Ideally, we want her to sleep in her own crib but right now that's a hit or a miss because some nights she will sleep through the night and others she won't BUT she definitely will when she's in our bed...