My husband and I were best friends with another couple for years (my husband with the husband and me with the wife). The couple worked for the same company. My sister (who is single) started working at same company as the couple; soon afterward, my best friend started talking to me about my sister being “too close” to her husband. I defended my sister, as I knew she would never do anything disrespectful to my best friend’s marriage. I also cautioned my sister to give the couple space. She explained that it was a completely platonic friendship. I thought it was a non-issue, so I forgot about it. But then my best friend stopped talking to my sister and me. I tried to find out why and to talk to her, but she froze me out. Her husband gradually did same to my sister, but he is still best friends with my husband. I feel so sad anytime I hear them on the phone talking because I feel like my husband should be on my side and not talk to them if they won’t talk to me. I am not sure how to tell him that I feel like he’s being disloyal to me.