It could be this. Old news in MA.
One of them discussed a surrogacy agreement between one of Romney's sons and a surrogate that contained an abortion clause.
There were some others too. I'm sure it's related to one of them. The one you linked to is certainly the most probable.
They all seem pretty silly and overwrought. The fever dreams of the KOS kids. They come down to allegations that Mitt was “mean” or “unfeeling” or intimidating when he counseled women not to abort a child.
I imagine that Allred’s allegations, if they surface at all, will involve one of them or one like them.