If this is the case, my answer is that I don't think she's trying to force her DD to wean. She's stated that her DD is showing signs of losing interest, but would like to continue otherwise. I think she's simply asking how to keep her supply up if and when her DD weans. Getting the info before it happens so that she's prepared. And hey, if her DD decides to keep feeding, then life continues exactly as it is now.
I think if that was the intention, nobody would be questioning it... But she did post this, which pretty much says the opposite.

I have decided to start weaning our baby next week and will reduce her feedings down to a single midday feed. Being in the middle of the day will even out my daily milk demand as best as I can. I think I will continue with a single feed to baby for for a few weeks or even a month and keep a close eye on my milk. My husband will continue to feed and suckle as usual twice daily during this time and hopefully he will continue to receive an adequate supply. If all goes well after a month or so then hubby will begin to exclusively nurse from me. I would very much like to be able to spend more daily sessions nursing my husband but this is just not possible with him working full time plus having other younger children at home. Having young children at home is the main reason I don't feel comfortable pumping.