Most likely you both have a viral throat infection that is causing some swelling lower in your throat, even though you don't have any other symptoms. Really, any other cause would be very unlikely to develop in both you and your daughter at the same time.
If it persists I would recommend that you see your doctor to have this checked out.
Advice and opinions given are based on the information provided and must not be considered an official medical recommendation. The limitations of the internet prevent an appropriate evaluation. Always consult your doctor if there is concern.