Not appropriate. Your colleague is you, or you are with your family (wife or husband), otherwise the person you attended this wedding is not clear. Interpersonal communication should have boundaries, and what is the relationship between the other party and you, then the other party should adapt. Go to your uncle's wedding. If you are unmarried, you can bring your unmarried sister; if you are married, you can bring your wife or husband; if you are married, you should bring your sister and husband with you; if you are unmarried, you should bring your family, brothers or sisters.