Am I unreasonable?

Honestly I think that's not that deep! A lot of the communication between me and my husband's family goes through my husband, and the same for my family like it goes through me unless it is a gc.
.I think with my sister in law (same BIL wife) one of us eventually made gc for the 4 of us around the time of my wedding last year because our husbands were taking too long to reply to each other lol 😂

I wouldn't over think it tbh! Unless she airs you when you message her or something.

I kind of had the same issue and got pissed off several times. He kept saying it’s not that deep maybe she just doesn’t know you that well, because she married his brother way before we got married.
But now after three years our relationship has gotten a lot better and she does text me directly. Sometimes she still texts my husband instead but it’s cool I’m fine with it now 😂

If you want a better relationship with her why not try messaging her first xx

I wouldn’t bother anymore hun, I dunno about you but with being a mam now I cba with anything if it’s not bringing positivity into my life xx

I know quite a few women that purposefully message the dad, especially when it comes to children/plans. They see it as sexist/unfair that the woman is automatically expected to take care of all those things. Maybe it's that? Especially if she is a mum herself and he is the one directly related to her, maybe she is actually trying to be nice?