Which is worst a Short term affair vs Long term affair?


My girlfriend and I were having a debate to see which is worst as her brother and his wife infidelity got exposed last weekend at a family function.

Here you go

The wife had a Long term affair - emotional (assuming she was emotionally attached and feelings was involved due to the length ) and physical (number of sexual encounters 50-60) for little over 2 years with one guy.

The husband affair - was only physical (number of sexual encounters 3-4 combined) for about a month with 2 girls.

Your thoughts on Which is worst and why? I know they both cheated and cheating is wrong but does it matter the number of sexual encounters and length of affair?
Which is worst a Short term affair vs Long term affair?
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