In order to avoid feeling envy about your sister-in-law, you can either focus on any of her social skills that you admire or you can reflect on all the wonderful qualities that you have. You can also try both of these strategies. When she shines in social situations, take note of what she does. Maybe she asks a lot of questions or tells funny stories. Consider whether you'd like to model this behavior, too. If you're less shy but still an introvert or a little more reserved, you can tell yourself, "I am incredibly thoughtful and think about what people say before I speak." What's most important is that you celebrate your unique value.