I need more info from the OP.
What kind of pics were these? Just sexy ones?
Is she seeing a T? Did she leave her ex & jump right into a relationship w/you?
Do you both talk openly about sex & what each other wants & what is satisfying?
If you need more sex then you need to ask. If she's uncomfortable about you seeing pics she needs to explain why? Does she think ur cheating or does she see it as competition & is jealous?

Lots of questions left to answer.