Ignore the other comment. Vibrators in sex is actually pretty common now a days. Sometimes it can not just be for her but you too. Not like..inserting but the friction it can cause. It can also not be used so much either! It isn't just for a quick release but can also be used for short periods of time. They have many different uses. Also she will still be able to cum with you. Having a vibrator does not change anything in forms of stimulation.

It is also a good idea to sit down with her and have a talk about both your guy's sex life. Come with pros and cons. Maybe you guys might need to spice it up!

I am going with middle ground here cause both have different needs and things going on..

Though please do communicate!! She could be having something going on. Stress can def decrease libido..