Alien abduction + 100% pregnancy chance cheat?

Thank you Cinebar and CrazyCandySims. Recently, my sim got abducted again and came back pregnant. They did explore space beforehand, but neither sim in the household is in the science career. All of these abductions happened within the last few times I played. Which would be less than a week in real time. About 3 abductions if I can recall correctly. 2 of the 3 times they come back pregnant. I'm wondering now what's with my game if there really was a patch to make it immensely more difficult to get abducted. I have the Get To Work expansion pack. So, maybe having that increased the chances on it's own?