Pag has suggested I ask this question here - I hope you all don't think I am making a mountain out of a mole hill......
DD has always been quite ahead of her peers - not hugely but at Kindergarten they have told me that she is quite "bright". I am under no illusions that she is gifted or anything btw just switched on 
. The reason I say this is that I think she can be a little manipulative in someways because of her switched on ness iyswim. I.e she knows the right buttons to push to gain attention - food etc. (She can be a tricky eater and often says one minute she isn't hungry when you have prepared food but if you ignore her she will come and sit down etc, anyway I digress!)
Recently she has started to lisp at the end of her sentences with "s" in. I know she wasn't doing this before christmas and she keeps claiming that she can't say "s" without lisping. However she can say it in other parts of a word or sentence. Now I don't know if she is doing this to press my buttons (i.e please dd will you speak more clearly,as she has done before) or if it is a genuine lisp that has just come about. I don't know if it is a normal behaviour pattern and I know that noone else has mentioned it to me. I am not unduly worried but I don't want to keep saying to her please speak more clearly if I am going to genuinely make her insecure about her speech. (I am not trying to but I just don't understand how one minute she was speaking clearly and now she isn't iyswim)
I know it is a trivial thing and if it is genuine then it is genuine, but if it is put on (which I have a feeling it might be as she holds her mouth differently) then how do I go about nipping it in the bud, if this is at all possible.
As I say, trivial but I am just wondering it if is developmental or something else.
Thank you.