Am I crazy?? Need some opinions??

My sister in law always texts my husband during football games whole time during game calls him her foot ball buddy cause my brother her husband doesn't really take any interest in foot ball n neither do I we weren't raised with it.  She will even text him n invite him over on Sunday's when a games playing but not text me. Sometimes she'll say can she just hang w him or play w him to me. I'm really thinking of saying something, it's driving me crazy.