Gramps understood that he'd made a horrible mistake going to visit Alison without any weapons, not even a damned laser-knife, which, at the moment, would have been a useful tool to slash away at the vegetation that continued to grow up around the three of them. Within minutes, they'd be completely covered, at which point Mother Naturia could take them anywhere she wanted or crush them into pulp.
A Mother Naturia that, right then, blocked the sun, she rose so high over them. Along with everything else, Gramps had to worry about Mother Naturia stepping on her while she swatted at Janet.
The grasping lawn got all the way to Abby and Alison's shoulders.