Sleep the sleep of the drunk. Just down a couple of 3 litre bottles of 7.5% cider and not only will you get off to a good night's sleep but you'll snore and fart so loudly she'll understand what you're going through and agree to use those sticky anti-snoring noseplaster things.
Visited a service mate of mine after having treatment. In the middle of the night his missus got up to go to the kitchen. Guest room was right across from the master bedroom. She stopped, put her ear to the door and wondered if I had died. On previous visits she could hear me over her hubby's noise.
It can be treated. Dare I say the NHS will cover it?