You could be doing everything right and your partner could still be tempted to cheat for reasons that have nothing to do with you or the feelings you share.
You can twist and turn, carry and shake and give her left and right while getting to
Powerbike:- Gives loud revving vibrating orgasms. Damn! 
No matter your background, age, or experience, having sex for the first time is a big deal. You can (and should) prepare for it as much as possible, but you still can't know exactly what it feels like until the deed is done. Obviously, everyone’s first time is going to be different, but there are still some things everyone should know before they lose their virginity.