Years ago, my now ex-boyfriend’s sister reached out to me and told me that he had been cheating on me with a couple of other girls. She didn’t really tell me anything that blew my mind, but she did confirm my suspicions while giving me the kick in the butt I needed to kick his butt to the curb.

A woman, who we’ll call “Rachel,” recently found herself in a similar predicament and turned to Reddit for advice. Rachel spotted her sister, Eleanor, in a coffee shop with a gentleman who was not Eleanor’s husband of four years, John. The two were behaving quite inappropriately. This is particularly devastating to Rachel who was always felt that John and Eleanor were the “perfect couple,” and now she’s ready to drop dime to her brother-in-law.

Well, today I was out for an early stroll around town with my boyfriend. We stayed out for maybe 3 hours or so, before walking back to the parking lot. On the way back, I couldn’t help noticing that my sister was sitting in the window of a coffee shop along the main street. I stopped us and I asked my boyfriend if we could sneak in to surprise her, since we hadn’t seen her for a few weeks. He said yes, but then suddenly grabbed my hand just before I went to go to the door.

My boyfriend said “Wait… she’s in there with a guy.”

I was confused, and she hadn’t noticed us so I just walked back around the corner, and then peered through the window again. Sure enough, she was seated opposite a man that was determinately not John. He had dark hair and he kept winking at her, holding her hand and bringing it up to his mouth to kiss it.

I was distraught. My boyfriend asked if I wanted to do anything, but I certainly wasn’t going to march in there and make a scene in front of all the other customers, so we just left.

Rachel seems to be hoping that there’s some sort of explanation for her sister’s behavior. But no matter how you slice it, a married woman being smooched up by any man other than her husband is suspect as hell. She definitely wants to say something, but is wondering if she should give her sister a chance to explain herself before going to John.

Now, I’m wondering who to bring this up with first. I was thinking I should bring this up with Eleanor first and tell her I saw them, but I’m risking her either 1.) denying everything (most likely) or 2.) admitting everything and then telling me not to tell John. If she did that, I’d tell him anyway, because f-ck no am I keeping infidelity from a loving husband, but she’d most likely completely hate me for telling him and cut me out of her life.

Unlike my situation, Rachel’s sister is married with a child, and clearly has a lot more to lose. When my ex’s sister rang the alarm, I was able to make a clean break; however, this news could potentially break up a family. Rachel has found herself in quite the pickle.

Would you tell on a cheating sibling?

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