Friends are friends, business are business.
More Portuguese Proverbs:
There is reason in the roasting of eggs.Portuguese
The ass of many owners is eaten by wolves.
Portuguese
Each one takes his/her own decisions.
Portuguese
The wine-skin has its reasons for smelling of pitch.
Portuguese
Don't be a baker if your head is made of butter.
Portuguese
If a rich man ate a snake, they would say it was because of his wisdom.
Portuguese