Any tips on discreetly buying a vibrator and hiding it?

I really want to buy a vibrator but I'm nervous to. You might be thinking "what's there to be nervous about?" Well even though I'm 20, I still live with my mom and she thinks masturbation is weird. I want to order a vibrator online but if she's it on my recent transactions on my debit card she's going to ask me about it or if she's something in the mail addressed to me and she sees the return address she's going to question what's inside. She's also kinda nosy and she might find it.