I have a questionnaire and I ask her questions while we have sex it sounds weird but she is a little more sincere because she is excited, it has worked for me now in a little more open dating guys
My wife goes to the gym and there are many muscular guys so I ask her which one interests her the most or which one she finds more attractive and I tell her I fantasize about them while we have sex also sometimes we go to bars she is shy so I buy her 2 beers to be less embarrassing and dance...
I recommend you not to pressure her and start using dildos bigger than your penis, be patient and play with her imagination for more excitement, good luck, if you have any doubt write me.