Doesn’t look like they are speaking to her. Looks like they are looking in two different directions to see where the third Saudi is. Chinese girl is obviously daughter of the chinese couple directly behind her. If they are speaking it is probably just casual talk.
In addition, the stroller belongs to the woman in front of the Saudis holding the child with the orange hat. I have seen two other photos of the orange hat leaning down by the stroller, he may be getting a toy or something out of it. Look at the 2 photos you just posted closely.