CORRECTION!
To get that Chinese-named Achievement, you gotta have Endergirl be f---ed in a Delivery Box (the one the Panda-girl came in).
After that, enjoy the new place you two got teleported into. >:)
use the ender pearl beads. if they get stuck, they teleport and reset. random chance to be teleported to a new location. best way i found to make the beads reset is to drag and hold them against the girl's belly while auto piston is running. the piston thinks the beads are inside and stuffing her more causes the beads to reset.