Should I tell my girlfriend that I'm taking steroids??

So I'm on steroids and trying to get bigger and its working my girlfriend was like wow your muscles are so hard now. All I said was yeah I'm going to the gym more now and taking some protein shakes ... lol she was clueless as to what I'm taking. The stuff I'm on has minimal side effects no aggression, little acne, no gyno and testicular shrinkage if any is minimal so she has no idea. Should I tell her?
Should I tell my girlfriend that I'm taking steroids??
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