If the kids are out of the house, one can certainly consider it, but that will still take a few years.
I believe that in this still acute phase, one cannot or does not want to imagine at all that one will once have nothing emotionally to do with one's still wife, no responsibility but also no involvement anymore, with the parents-in-law definitely not, as they will understandably give their affection to the new boyfriend (soon maybe also husband). By no means am I saying that one will suddenly stop liking someone with whom one previously had perhaps even a very close connection, but ultimately both sides will probably change in completely different directions (perhaps even spatially); after all, they separated because they had irreconcilably different ideas about life or its contents. Of course, no one can know how it will develop, but with high probability one can state that, as the original poster desires, it will probably not happen, because all parties involved have their very own ideas after such a separation, meaning parents-in-law, both new partners, children who differ again according to their age. No one here wants to talk you out of anything that represents your fundamental attitude. However, in some places it comes across that you currently tend to underestimate your own needs, which your children will not like either. I find generosity, which by the way does not necessarily have to be expressed in money, fundamentally great, yet one should also remember that hopefully many good years lie ahead and at some point in the new life this relatively short marriage should no longer have any impact on the new life. Otherwise, there would be the risk that a new partner would have to "put up with" what one wanted to spare the ex-partner, and I would find that neither fair nor helpful for a new and hopefully long-lasting relationship. Your new partner likes the children and does not complain, which is very nice; nevertheless, one should not overuse this point either, because ultimately they are not her own children and emotionally the ex-wife has nothing to do with it.