It's easy for me. She can't tell the difference between a tele, a strat or a les paul. As long as it's the same colour she doesn't notice a thing. (This is one of the reasons why all my guitars are sunburst.
)
Same with amps. One little black box is like another.
If I
do discuss changing/buying gear with her she instantly gets that thin-lipped disapproving vibe wives do...the one that gives you butterflies in the stomach and makes you feel 9 years old and
bad. I'm sure it's some sort of female genetically controlled automated response that bypasses logic.