In book #4, IIRC, they author reveals a *1* line reference to the *MARRIED* lead characters having sex.
At which time the female becomes, not only pregnant but, also a VAMPIRE, herself.
Not just 1 line, there’s some pretty intense descriptions, and the vampire thing comes later, and not as a result.
The fourth book carries what could arguably be called a very pro-life message. Which is, I suspect, why a lotta libs hate the books.