Something is Sucking our Galaxy Slowly. Are We in Danger?

If there was sound in space our galaxy would roar as a Formula One bolide. After all, the Milky Way races at a speed of six hundred thirty-one kilometers per second.
But while a bolide speeds up thanks to engine power, our galaxy rather gets dragged by some supermassive object. 
We know that the Great Attractor pulls ours and the neighboring galaxies closer at a speed of three hundred thirty kilometers per second. 
But wait a minute – I’ve just said that we are moving faster than that, haven’t I? So, is there another mega-object besides the Attractor that is longing to swallow us? Or are we getting sucked into another Universe? After all, what is sucking our galaxy up at this incredible speed?