AITA for not telling my girlfriend I've been using her hair заклад and other feminine products.

So basically, my girlfriend moved in and she had a bunch of hair stuff like keratin and hair masks and we all know, they're really expensive. I've never used a hair mask before but I thought it couldn't hurt and I have used them along with her biotin supplements. <br><br>I have really long hair and it does feel great so I don't think I will stop any time soon and I am not sure how she'll react. She's never accused me of stealing but we live together and she can see me use it. I want to know if she does not bring it up then should I? She basically invited herself to move in but I'm happy to have her. Sorry if this is not in the right place but I just want to know what others think. <br><br>TLDR: I've been using my gf hair stuff, do I tell her now or do I ask her if she needs it? Or do I wait for her to bring it up??