So now that all of us non-UK folk looked up what a li-lo is. :)
I'm trying to think of something that hasn't already been said here on your page regarding your daughter, but it's hard to even know where to begin. My boys didn't have a phone until they were at least into their high school years (11 years ago or so). You would know better just how much control she has over her device and who else might be monitoring it.
Also, I'll point out that it's hard to know what you're feeling or what you want when you're a 12-year-old girl, no matter how much society want to assign teens and pre-teens some sort of adult status, or that we might want to treat them as such. Way too much going on that doesn't really settle down for a while.
I'm afraid I'm not going to be much help, then. I do appreciate the whole air mattress while riding a bike tip. If I hadn't had a blown up raft rip off the railing on top of our car as it went down the road, I might not sympathize with you, but I feel your pain. :)
A floatie for you too? I've just learnt that one :)
Thanks for the support, to you and everyone who's replied. I feel better about things today.