Bed guard for King Size Bed?

[SleepForTheWeak]

My DD (22months) comes into our bed with us most nights. She sleeps in between me and DH and the dog when she is in our bed.

DH works away quite a lot and I borrowed a bed rail from a friend for his side of the bed. I (wrongly) presumed the weight of the mattress plus is on top would have held it in place but poor DD fell out of the bed last night between the guard and the bed . She must have been sleeping against it and it's moved the poles from under the mattress enough for her to slip through. She was Ok, just got a fright.

So, is there a bed guard/rail I could use on a Kingsize Divan bed that I could be confident stays in place? Have searched google but can't seem to find anything...

[SleepForTheWeak]

Bump

[InsaneDame]

Could you push the bed up against the wall on that side for now until she stops coming in?