I think that for it to be sex addiction she must actually be having sexual thoughts for the majority of her day and if she's not having sex or being sexually stimulated in some type of way then she will become irritated. Does she seem like she's not in a positive mood when she's not engaging in something sexual? From what I can see, you make it seem like she wants to try different types of sexual activities with you that you are not comfortable with. If you are TRULY not comfortable, then don't do it. But I think you guys can meet somewhere halfway. Relationships are a give and take- maybe try what she wants and then she can try something you want to do! If she truly is a sex addict then she should seek therapy first.