Erm... the title explains it. If you want to win back a husband that has cheated, is cheating, has acknowledged he is cheating, may have moved in with other woman... IF.
So the advice is, as far as I can see, really appropriate. Why beg him to come back, make a lot of changes in his behaviour, if you won't make any changes in yours? He won't want to come back to the same old resentful, not right home he has already left once. Everything has to be examined and changed, if you want to win him back
As for the have sex when you don't want to, that is a no brainer. You don't want to have sex because he has cheated, the OW will be all over him and in your head too. So the first time you really won't want to, but you will HAVE to if you want to win him back - if you don't / can't then the relationship is over and you don't want to win him back.
If you don't want to win him back then the whole piece is of no use to you! Most of the previous responses are from the (probably wholly sensible women) who would never want to win that kind of prize anyway. But some women do!