They take you on board their ship and use the probulator to impregnate you (it doesn't matter if you're female or male) with an alien-human hybrid baby, then put you back on Earth.
What will you do with your new hybrid alien baby? Keep it and raise it as your own? Dump it at the hospital and let the state deal with it? Have it sucked out and flushed down the toilet? Perform scientific experiments on it? Put it in a freak show? Something else?