Well I can kind of see it from your Dh's end Ses. I wonder whether it's more to do with making decisions about his son himself, feeling a part of everything, as he has been a bit frustrated with obv not being able to BF iirc.
For me it wouldn't be an issue (mine isn't lucky enough to be a pfb), missing first steps, giggles and words is a biggie, having a soother, not so much.
That's just my tuppenceworth, no offence intended.
The weight issues are a whole other ball game tho
I never got a linea nigra so can't help, my stomach usually goes back to nice and toned with a good bit of work at about 6 months. I find Pilates and runnng a great combo. I'm heavier now than I was just after I had Dd2 which is bugging me, but I know it'll come off when she stops nightfeeding, until then I feel fat