In Brazilian culture, people tend to be more expressive and affectionate in their communication, even with friends. Terms like "amore" (similar to "darling" or "sweetie") and "bjss" (short for "beijos," which means "kisses") are commonly used among friends, especially between women.
The way Brazilians interact and express affection through language may differ from what is considered typical in some other cultures. Terms of endearment and kissy faces might be used casually without any romantic intentions. It is relatively common for friends, including both men and women, to use these expressions when chatting, and it doesn't necessarily imply a romantic relationship.
However, it's essential to consider the context and the specific relationship your wife has with this guy. If you feel uncomfortable or uncertain about the nature of their communication, it's crucial to communicate openly with your wife about your feelings. Honest and respectful communication is key to understanding each other's boundaries and expectations in the relationship.
Remember that cultural norms can vary, and what might be acceptable in one culture might be seen differently in another. In any relationship, trust and open communication are vital to building a strong and healthy connection between partners. If you have concerns, address them with your wife and try to understand each other's perspectives and intentions better.