First, love the direction this is going, both the classic building use and melting twist. Can only hope her lower mouth's going to consume even more. <3
I feel awkward trying to point this out when I'm no art expert myself, but this page kinda feels like it's missing a sense of scale. Like the building she's using as a dildo doesn't feel much like a building? I dunno it might just be me, don't want to be a nitpick.