Cosmopolitan: 28 Signs Your S.O. Is Cheating on You, According to 11 Experts

They suddenly pay more attention to their looks. “Couples tend to care less about their looks once they feel secure in their relationship, so if your S.O. is suddenly buying new clothes to dress up or taking extra long to get ready in the mornings, they may be up to something,” says Chris Pleines, dating expert at Datingscout.com. [...]