I don't know.
Let me think about it.
It's a really hard decision, isn't it?
You really should consider.
As you know, it could be so unexpectedly fun, awesome and grrrrreat to have two kittens in the house

Really, a calico and a ginger? Hell yeah, go for it! They will not only provide you with endless entertainment, but your old kitteh might just sit somewhere and watch them, and have a smirk on her face

I've had that happen before

Just give the old kitteh time to get slowly introduced to them - keep the babies separate from her in another room for a week - if you just can.
I actually had my new kittens (they're 4 months old now) in a big huge dog crate for the nights when they first arrived - and if we were not at home I'd put them in the crate, too. I have five other cats in the house, and I wanted the other cats to be able to see them and smell them, but only get close to them when I was around to supervise them. There was really no drama to it, only one of the old ones hisses at them when they come closer than a foot or two of her.
And yeah, your husband is really secretly intrigued of the thought of two kittens - he just won't say it out loud

You'll see, he will be telling you he had forgotten how stinking cute baby kitties are while he's holding one and snuggling with it.

If he didn't want them he would have said "NO" in no uncertain terms!
I can't see the pic either, maybe I need to log on to fb....