The 42,000baht figure is what she owes, it is not what he lent to her I believe, one of us is reading the posts wrong, hope it's not me 
dirtydog, you are correct sir, that is the total of her outstanding debt, no way would I give anyone 42000 baht,
poshkid, it was a whole month actually

and it was a bloody good month too,
To be fair to the girl she didn't ask for too much when I was with her, she had pawned some of her gold to fund her Uni course and as it was her birthday while I was there I volunteered to get some of it back, not expensive, silver don't do expensive.
Anyway as I said no tatts,no kids,no smoking, no swearing bar what she learnt from me, no brothers no sisters no family full stop, and I confirmed this with some her friends at the place she works at, big building with a cross on top near the Mall

Thanks for all your good honest replies and advice though and thanks for not flaming me for being a twat.
P.S I just found out why she's been so cranky, as a final project for her uni degree she was waiting on someone writing a computer programme for her, it is due in on Tuesday and only arrived this afternoon, now she has to work all weekend to finish the whole project. ouch