April Masini is Ask April, founder of Relationship Advice Forum, sometimes, it’s OK to be friends with an ex, even if you’re in a new relationship, but sometimes, it can veer on the side of inappropriate. It all comes down to boundaries. So I asked New York-based relationship and etiquette expert and author April Masini about when your partner’s friendship with their ex could jeopardize your relationship. And I could have used her advice a few years ago. “If your partner tends to make late-night calls to his or her ex, after you’re asleep, it’s because they have an intimate relationship that doesn’t include you,” says Masini. “This is a bad sign for your romantic relationship because the seeds for romance are being sown in these late-night calls with someone your ex has been in love with before. It sets the stage for romance — without you.”