Buying Toys?

Hi, so I'm 16, and I've been wanting to buy a small and discreet vibrator, but I keep getting nervous that my mom will find it.

I have my own card, so my best bet is probably buying online, but I don't want to risk her opening the package in any way to even think about what's in there. I get home late so waiting at the door isn't really an option either.

I want to avoid any and all chance of her noticing something is up (and I definitely do not want to talk to her about it).

(Just for reference, it's not that I don't trust my mom. It's just a very taboo topic in my culture.)

What do I do?