I'm sure she has a Facebore page with recent photos, so you can have an idea just how well she's lasted
IMHO my Korean ex actually looks better now (21 years after we split), she eventually married a Kiwi after turning me down, twice!
Whilst this is excellent advice, it's worth noting that NGV/CNG (mostly methane) is not the same as LPG/cooking gas (mostly propane).
NGV is stored has a highly-compressed gas, as opposed to LPG which is stored as a liquid under much lower pressure.
I must admit to being more than somewhat surprised that automatic shutoff valves are not already part of the NGV standard.