How many times have you found yourself going head to head with your spouse's sister despite putting in the effort to be friendly? Sometimes, people are simply incompatible and it may be the result of their astrological signs. However, understanding others' signs may be able to help you get along with them in the future.
If your sister-in-law was born between August 23 and September 22, this means she's a feisty Virgo. These individuals have a tendency to be inflexible at times and downright stubborn. If it seems like you can never compromise with your sister in law, this may be why.
However, there are some positive traits that Virgos have as well. Despite being fussy at times, Virgos can be helpful because of their ability to critique and analyze their environments efficiently. It's also worth noting that Virgos tend to be reliable. This means that if you ever need a shoulder to lean on during tough times, your sister-in-law will likely be there for you - and what else is family for?