How do I build trust with my stepchild when they resent my relationship with their parent?

Resentment is often fear wearing a different mask—fear of loyalty betrayal, of being replaced, of losing what was theirs alone. I've found that the most useful thing you can do is stop trying to earn trust through grand gestures or forced bonding. Instead, show up consistently in small ways. Notice what matters to them. Respect their grief about family change, even if it's uncomfortable to witness. Don't compete for your partner's attention; that only confirms their worst suspicion. And here's what took me years to learn: some trust builds not from you winning them over, but from them gradually realizing you're not going anywhere—not because you're perfect, but because you're reliably present through the mundane moments. The bedrock of trust is repetition and restraint, not intensity. Let them come to you at their own pace. Your job isn't to be their parent or best friend. It's to be someone steady they can eventually believe in.