I've explained the basics in the picture I drew, so I guess I'll go into more of how she actually works?
When she absorbs things, she can either keep them in suspension in her goo, like fruit chunks in jello, or she can dissolve things too. Both add to her mass so it doesn't matter either way. It's completely possible to get things back out of the goo again in one piece...if a little slimey.
Y'know she may be harmless but something tells me she isn't shy of all the giantess lark.