Alien Child. Alien Affairs, #3

Years after her mother cajoled the secret to reversing the effects of alien induced global infertility from the libidinous alien, Deshler, the birth rate begins to rebound when another alien craft arrives on a follow-up visit. Terrie Deshler desperately tries to be a normal teenager while threatened by jihadists, hounded by the government, pursued by Russians and menaced by fertility probing aliens.
Being only one of a handful who can communicate with the no nonsense alien, Mischa, she and her mother apply their wiles to convince the suspicious invaders that their plan for human extinction is on track. The fact that her aunt is secretly dispensing the fertility restoration cure to an elite few brings the wrath of the masses down on them all while the space raiders circle the planet searching for evidence of reproduction.