I think our frolicking titles are probably ok, as we now have strong evidence of having frolicked. 
However we might have to become the pre-second-time-frolickers?
No threat of DC2 here yet though, I want a 3 year recovery gap if possible. 
Weaning is going well. :) I'm stopping BF for several reasons...
a) Going back to work in April, can't be bothered expressing every single day! And I wanted the shift to be done before throwing other changes, like nursery, at her.
b) I seem to be catching every single darn cold going, I've had two in the last month! I don't know whether my susceptibility is BF related, but by stopping at least I'll finally be able to take some effective medication. 
c) Mindy is getting big now, and strong. It's awkward to lay her over my lap, and she can kick and squirm all over the place. She also hasn't got teeth yet (slow poke) but does have very hard gums and a very strong bite. 
d) My 32J breasts don't fit into any of my clothes and just look comedic oversized on me, really hoping they'll reduce. I also can't shift the last stone of baby weight, hoping that I can lose it once BF is stopped.
The weaning off is going a lot easier than I thought it would, to be honest. :) My breasts have been a bit uncomfortable as the milk supply has adjusted down, but it's not been too bad.
I was also worried that Mindy would miss it, but to be honest she hasn't cared as long as her tummy gets filled.
I'm kinda glad, as it's made me feel less guilty!
I am a little sad about losing the closeness of BFing my baby, but continuing to BF won't keep Mindy a tiny baby. She's getting bigger every day and will grow up, whether I want her to or not.
Stopping now before she's really aware will be easier than later down the line, I reckon.
That's great that Tegan is gaining weight well.
However if you're worried, have you considered doing mixed feeding? At 4 months your supply will be pretty well established, introducing a bottle of formula each day shouldn't harm it.
Alternatively, if you think Tegan is ready then you could try her with a bit of baby porridge?