Edit: figured it out.  Apparently InTeen went haywire and was causing it.

Thanks for trying to help me figure it out!

Yep.  It won't work for any Sim.

Nope, not pregnant and not on the birthcontrol.  That's why I'm so confused :\

I have no idea what I did, but for some reason the Try For Baby option no longer shows up.  I didn't download any hacks or mods recently, so I'm fairly certain none of the ones I have are causing problems.  My Sims relationship scores are at the max and both still have plenty of days left before they become elders so .. I'm completely lost, lol.

Any ideas what I might've screwed up?

*sighs* This is the exact problem I'm having right now.  I bought the collars for my little dogs (I bought two of both the small sized collars and the large sized ones, just in case) but when I go to the change appearance it acts like I never bought them.  All of my hacks/mods are up to date for Seasons, so I'm not sure if that's what causing the issue, but I'd think that it'd be fine -_-

Anyone ever figure out what the problem was?