I have just secured 2x seats in row 19 at T-96 on the A350-900 (i.e. the bulkhead + bassinet row).

I do not have an infant travelling with me, but I do have a 4 year old child that I need to sit next to.

How should I think about the risk of another passenger showing up with an infant and us being moved out of the seats I have just selected for row 19?