Hello. My name is Joel. Thank you for your question. I can help you resolve your problem. You need to have an internet connection to download the drivers for your printer. If you have a router, you can connect your mac computer to your local area network by on of two methods: Wirelessly or with an ethernet cable. If you do not have a router, you can disconnect your husband's ethernet cable and use it to temporarily connect your mac to the internet.
Okay then You said that your problem was that you were not "wired" to the internet. A wired connection would require two Ethernet cables, one connecting your printer to your router and another connecting your computer to your router. However, both connections can be made wirelessly, if you have a wireless router.
The first thing you must do is to go to your printer control panel and use the network menus to select your wireless network by name (SSID) and enter your password (Network Security Key) if it is protected network. I assume that you know your network name and that your are using your mac connected to your wifi network for this conversation.
Then select this link to download and install the drivers for your operating system from the Canon website: http://tinyurl.com/mf8280cwdrivers
After installation you can open the printer software on your computer and print a test page.
You do not have to have a wired connection to use the download link. It does not matter how your husband is connected, ethernet or wireless. You can connect wirelessly.
You can have the convenience of wireless, but it requires two connections: Between your mac and your router and between your printer and your router. I can help your with this by establishing a remote desktop support session where I can take control of the computer and perform a proper installation for you, with your cooperation in operating the printer control panel. Please let me know if you want todo this.
The problem is not with your mac. You need to use the control panel on the printer to connect the printer to the wireless network.
You have to display the wireless network name (SSID) on the printer display and enter the wireless password (Network Security Key).