Student or Learner
She signalled to the children to come inside.
In my opinion, this sentence has two meanings. For example:
Meaning 1: She signalled for the children to come inside. (she gave the children a sign so that they came inside).
Meaning 2: She signalled to the children in order to come inside. (In this sentence, she gives a sign to the children because she wants to come)
Is what I try to tell you right?
I don't understand your second meaning; 'in order to' makes no sense there....
Oh, I get it. She's outside and the door's locked. In that case, your 'because she wants' [usually 'wanted'] makes that clear. I don't think 'She signalled to the children to come inside' is ambiguous. If you signal someone it's because you want them to do something.