I agree that she should be able to tell you what it is that she likes. That is the only way to get her to enjoy it is to get her actively involved in her own pleasures.
I am confused what hurts her? Are you using toys? Perhaps if you put the toys away and have just eachother to softly explore eachothers bodies and what feels best before re-introducing toys! Good luck I hope you both can enjoy your sexlife?
maybe not be so rough on her, & you could get her too show you what she likes then take it slowely & let her tell you what fells good & what doesnt so you can learn..