1. When you first met her, it was love at first sight.
2. Your know that your relationship depends on more important things than blood relations.
3. And your sister-in-law fits so well into your family that you can't believe you're not actually related.
4. At this point, your friendship with your sister-in-law has moved well beyond the sibling who introduced you.
5. In fact, you're probably the best person in the whole world for her to complain about her partner with.
6. UNLESS the problem is about, uh, sex stuff.
7. You are each other's #1 selfie companion.
8. And you might even look weirdly similar.
9. She's the only one who's actually honest with you about the deal with her family.
10. So you are natural allies at family gatherings.
11. And you're each other's main support if things get...tense.
12. Yup, family gatherings would be a whole lot worse without her there.
13. Because you always know what the other one needs to get by.
14. But in any case, you've become an excellent third wheel in her relationship with your sibling.
15. You're a shoe-in to be each other's bridesmaids.
16. You consult her for all your most important fashion and/or dating decisions.
17. You know all about each other's childhoods, even though you didn't know each other back then.
18. Basically you can't remember what it was like before your sister-in-law was in the picture.
19. You just don't get it when people complain about their in-laws.
20. You're good friends, so you give each other plenty of ego boosts.
21. But you're also family, so you can dish out the tough love when it's needed.
