http://www.sultry-leather.com/bdsm.html
ONE of the many sites that a search of BDSM and INFO would come up with. Make sure you read some stuff before u start spanking, start LIGHT and build up, and spank relative to her excitement.
Also, agree on a safeword so you could do some roleplaying, (policeman-thief/criminal/whatever , teacher-student , uncle-niece, etc) and so that she can say NOOOO without you having to stop. [makes scene more 'real' and if it really is a problem, she uses the safeword].
You can use MORE 'safewords' one that means STOP! NOW!, one for NOT THAT HARD!, one for GIVE ME ALL YOU'VE GOT!, etc. just make sure you remember them....
DO check out different types of spanking 'devices' beforehand and their effect (both phisycal and pain-intensive), and CHANGE them.
Also some ICE or HOT WAX in between is a nice addition (or some really smooooth soft tissue (silk or something) to caress her senstive bottom between changes of devices)..
ALSO, see if the ass is the ONLY place she likes spanked. Light spanking can also be applied on inner thighs and breasts].
and DO tell what happend, please ..
