The boy taught my daughter to do her Maths in library. I went to have lunch with my daughters. During lunch time, the boy and my elder daughter sat at the next table; and I sat at another table with my younger daughter. However they did not talk at all and looked as if foucsed on their food , but . . .
(boy - text messaging) and then ate his food
(girl - look at her phone, text back), and then ate the food
(boy - read message and then text back) and ate food
(girl - read message and then text back) and ate food
so and .there must be something. should i ask or or just ask casually i see this and feel ?