Okie dokey, here we go!
Maud Millicent sat with her back pressed against the hallway wall, scrunched up on the floor.
Maybe its just me, but I've always disliked it when stories start out with the main character's first and last name. A better way to introduce her name might be having someone else call her mother Mrs. Millicent or something. Also, scrunched sounds odd here, I would replace it with something like 'curled up on the floor' or 'sat on the floor, her knees pressed against her chest'.
...in search of a cool glass of milk, for her dry throat.
No comma needed here.
Greg Milicent's words were cut off by his wife's mousy shriek.
Having a 'mousy' shriek doesn't make sense, as mousy implies that it is subdued or quiet. You could say 'another' shriek, or something about her voice becoming shrill, and so on.
"But what, Terry? What?"
This threw me off, because I thought she was calling her husband by the wrong name.
It might be good if you gave an indication when this other guy talks, like "another male voice spoke" or something.
...a very sweet voice, the kind you got from drinking lots of tea...
Does drinking a lot of tea actually make your voice sweeter? In any case this is a slightly weird description. Using tea is a good idea, maybe saying how it was 'like warm tea' or 'honeyed tea', you know?
The tea-drinker, was a very odd lady. She couldn’t be any older than thirty four, yet she had that look about her you found in crazy old grannies. She was dressed in a dark cloak covered in shiny silver stars and crescent moons, with hundreds of pockets all over, most of them full (with contents equally stranger as her apparel). There was every sort of loud clanking jewellery piece you could possibly imagine on her; bright beaded necklaces with feathers and charms dangling from them, chunky bangle with painted on flowers, large rings dotted with dazzling colourful gems. Ebony hair which was supposed to be tied in a tight sensible bun, but it seemed to overflow, coils escaped around her ears and down the back of her neck wildly. What seemed to stand out the most though, were her bird’s nose, long and beaky, and her two very sharp vibrant emerald eyes.
Saying 'she couldn't be any older than thirty-four sounds a little odd here. Being a little more general about her age would make a bit more sense I think.
The part about crazy old grannies is funny, but could use a little restructure to make it flow better. 'like those crazy old women that muttered to themselves and had fifty cats'. 'Jewellery' should be 'jewelry', and 'colourful' 'colorful'. Also add in something like 'that she had apparently tried to put in a tight sensible bun' as opposed to 'which was supposed to be', as it sounds a bit clearer.
Now onto the next one. A man. Dressed from head to toe in black, not a speck of color on him. It drew attention to his features though. A dark jagged crop of hair, with rich dark brown eyes, and a hard square jaw. Maud reckoned he has the kind of face that young girl’s got odd crushes on.
Simply saying, 'the man next to her was...' or the like flows better, especially if you combine the first and third sentences, and get rid of the second.
With another swish the glass then floated up to Maud’s hand for her to take, and milk tidies itself away.
The milk 'tidied' itself away. Past tense follows the rest of the story, not present tense.
Maud remembered that two total strangers had seen her in her pyjamas, and felt her face flush scarlet red with embarrassment.
No need to say 'scarlet red', just use one or the other.
Well, that's it for a quick read through. Overall its quite interesting, and I especially enjoyed the description of the colors around them when Maude was looking through the glass. As the previous responder said, this does however sound like more of a second chapter. Other than a few grammar and structure issues, this is good, and I hope you continue writing.
As for title suggestions, hmmm....
Well if the potion you mentioned has a name, that could make a good title. There is also 'Mystic' or 'Locked' (to imply that her power is trapped within her) 'The Skip' and 'Bordering on Magic'.
That's all I have for now, hope it helps!
It might be good if you gave an indication when this other guy talks, like "another male voice spoke" or something.