http://throb.gizmodo.com/turns-out-the-ebola-virus-can-be-sexually-transmitted-1737730480
No symptoms exhibited, spread it anyway.
Quarantines are based on risk to the public, not risk to her boyfriend, so the sexual transmission is irrelevant. But, fine:
The only way she would have had it and spread it is if (1) she had exhibited symptoms, and then continued to defy the quarantine; or (2) if she had ebola, with a low viral load, and had unprotected sex with her boyfriend, transmitting it to him. And if she had done that, then of course I would be criticizing her.
And, in any event, that's wrong. The guy who spread it was a survivor - he had previously exhibited symptoms (meaning that his viral load had become elevated enough to transmit in his bodily fluids, including his semen). The virus remained in his semen AFTER he no longer exhibited symptoms, but that is not evidence that it can be spread BEFORE symptoms arise.