I have just read all of this thread
I dont have any personal experience or professional advice to contribute, but just to say that I think its fairly "normal" to assume the worse and be confrontational in these situations.
I have not been abused and I trust my DH but if DD was to say anything along the lines of Morethan's DD then I would be hearing alarm bills. Reading this thread (with the wipes and dungarees example, I realise I would perhaps be wrong) but its the lioness instinct. Protect at all costs etc etc. I would not confront in the same manner, but I would ask questions. Maybe its a sad reflection of todays world.
In fact, sometimes I get uncomfortable if any bloke (other than DH) is jiggling my DD around on their knee. I just dont like it, and I know that its wrong of me to think that, but I dont. I dont stop it but I keep an eye on things. I am made aware of child abuse victims via my work so perhaps I am "over exposed" to it. Its sad to feel supsicious (without grounding) but I would rather feel suspicious than risk anything happening to her
Morethan, trust your instincts and please dont just listen to your mum's. What would she know about it? And I dont mean that nastily to her.
The kiss. I have read that its open mouth to open mouth (rather than french kissing). This is difficult as I kiss my DD on the lips and we make open mouths at one another, and say "ahhhhhh" as a pre kiss thing. Maybe I should not do this but she is my DD and it is nothing sinister at all. She is only 12 months and its a way to communicate. I now feel a bit about this but maybe your DH did not mean anything by the kiss but go with your instincts and please at least call someone professional, who knows what they are talking about, unlike me.