My best guess after experiencing my wife after she’s fucked hugh cocks, gang bangs, ...... birth, fisting, Double Vaginal penetration etc is this.
Her Vagina is a muscle that can be tired out/exhausted like any other muscle. Once stretched out for an hour or so she can not do her “kegle” contractions to grip a cock. The muscle is exhausted and her pussy will gape open for a hour or so. Thats when its time for Double Vaginal Penetration and fisting! Which she finds most pleasurable.
DVP and fisting isn’t possible if she hasn’t been stretched out and thoroughly warmed up aka vaginal muscle exhausted. Takes a lot of prior practice and patience but so enjoyable for everyone when it does happen.
Its a combination of size and time to tire her pussy out. Staying wet is her real challenge and using lots of good lube and frequent reapplication is critical for her to enjoy these marathon fuck sessions.
