I am sorry to hear that you are perceiving your wife needing to have sex with her spouse, that is you, as Sex Addiction, unless her pattern has changed since you two started dating each other. In case you are concerned about her hormonal changes, then you may want to have her Primary Care Physician get her blood tested, specifically her testosterone level. In case you suspect drug abuse leading to heightened sexuality, then you need to address that issue. Encouraging her to accompany you to see a Licensed Sex Therapist, who specializes also in couple therapy, would be recommended. There are also sex addicts groups available in case she qualifies for that.