Huge congrats Wild, that's wonderful news 
I am not a good advocate for tandem feeding
I remember being with a group of mums of whom several had tandem fed and revealed at one point googling "I fucking hate tandem breastfeeding" and how much it helped to read other people's stories about hating it, because mainly people write about how amazing it is so hating it feels quite lonely - and they all said they'd done exactly the same
Poorly constructed sentence, sorry, but hopefully you get the gist!
I found bfing through pregnancy hard (really hurt!) but DD was very keen and I wanted to try tandeming. Think I developed nursing aversion either during pregnancy or soon after DS arrived, though it only struck when DD was nursing, not DD - horrible, like my skin was crawling. Remember digging my nails into my palms to give me a different sensation to focus on.
First few feeds were lovely - DD sat on my lap and DS sat on hers :) Once he got too big they would just sit either side of me on the sofa I think or in bed, though after a while avoided feeding them at the same time if I could.
Engorgement was horrendous - I have oversupply anyway, but it was being stimulated by two but DD was sleeping 12 hours through the night.
BUT - despite this long tale of woe, sorry
- I would consider doing it again, if DS didn't self-wean during pregnancy. Seeing them hold hands while nursing or DD showing DS how to do it were ridiculously cute and they are very close now, I think it did help build the relationship between them. I suspect DS might take badly to a younger sibling so am wondering whether tandem feeding might help ...
Sorry for essay!
Also apologies for the fact my previous post made very little sense! I will translate it ... I'm already on the thread for those TTC DC3 but also still bfing so thought I'd obsess here too. Last time AF returned at around 14 months (I think) but had very long/irregular cycles for a long time and don't think I was oving. This time they are back to regular 27-28 days so hoping am now oving. Was on CD17 (now CD22 I think) but had EWCM around CD16 so not sure whether I oved later than usual and will have longer cycle or I usually ov then and luteal phase is short.
Will post a biscuit to anyone still reading :)