Dear Prudence,
I recently learned that my boyfriend, “Phil,” is involved with another woman, “Valerie.” We met by accident at the same nail salon. We got to talking, and when the conversation turned to our significant others, there were so many similarities that we compared photos on our phones and realized he was playing both of us. Phil doesn’t know that we are onto him. Valerie and I plan on confronting him together. Any pointers?
—He’s Got Double Trouble Now