Oh snap, girl

lie detector determined that was a lie.

Wow

Maybe he sent his sperm overseas.

Rest and relieve.
Soldiers get to go home for a week or two without officially ending their deployment.
A lot of military babies are conceived in that time frame.

R&R baby. Probably happened during rest and relaxation time

Or perhaps it was a Test tube baby, Or via IVF?

R & R baby is a good explanation, and a valid one for many. But that look on her face seems say otherwise.