Sometimes I wonder about the facts of decreasing birth rates if people I know do end up getting married and having kids. Sadly one couple had a miscarriage.
People can get real lonely. They meet someone who clicks with them and the rest is a matter of the spy managing to extract anything useful out of them.
Honey trapping is a very old spy tradition. Using woman or men to fuck their way into getting secrets or blackmailing who they fuck if they're gay or underage.