At 24 weeks (which, technically, was last week), Aden started to sit "supported;" meaning, I wouldn't confidently plop him down on the floor and walk away, but he is now able to sit un-assisted with supervision. There's still plenty of instances he throws himself backwards unexpectedly, like babies tend to do at this age, so he's sporting the Boppy pillow around his middle for safe measure.
Sitting might be one of my very favorite baby milestones. It's so helpful when Aden can balance in a sitting position while I dress / undress him and I love how he's able to "hold his own" a bit more when sitting beside Tory. Sitting also brings additional milestones - like sitting in a high chair at meal times. I haven't fed Aden any baby food yet, but he's now able to hold himself upright in the high chair without slumping over to one side. He even joined Tory and I at the breakfast table this morning and soon, he'll be eating food right along with us.