Does sims 4 not recognize in-laws?

It doesn't, unfortunately. I wish it would

No, and it's a shame that this has not been updated yet. There are not many relationships in the panels and even less in CAS.

"Chazzzy;c-16590068" wrote:
Nope. Mothers flirt with son-in-laws and Fathers flirt with daughter-in-laws etc all day every day.

I wouldn't want the possibility of flirting with the in-laws completely gone (sometimes there HAS to be drama!) but at the moment it's all over the place and autonomous. I want them to recognise each other as what they are, not as just acquaintances or whatever.

I wish we could get some second and third cousin options as well, it seems weird when that relationship drops to "acquaintance" after two cousins have kids, especially in the tight knit world that is the sims universe.

"CagierSaturn;c-16591401" wrote:
I wish we could get some second and third cousin options as well, it seems weird when that relationship drops to "acquaintance" after two cousins have kids, especially in the tight knit world that is the sims universe.

Agreed.

I definitely think it's odd that a game so centered around families and relationships is so lacking in depth in these areas.

Unfortunately, no... the game also doesn't recognize uncles and aunts that aren't from the 'original' family. For example, if you have one of your kids get married, while the other kid has a son/daughter, that child will only recognize their parent's brother or sister as his/her aunt or uncle. Their spouse will NOT be viewed as one... which makes absolutely no sense!

"So_Money;c-16591451" wrote:
I definitely think it's odd that a game so centered around families and relationships is so lacking in depth in these areas.

Same! I feel like they could update the game to include all the different relationships or put them in a pack.

I don’t like that either, @Lustianicia.

Not in panel, but generally I think they do. Because why would they so desperately flirt with in-laws especially if they live together, in my game?