Simultaneous anal contractions & ejaculation

One of my greatest pleasures has always been to feel the anus of a female partner rhythmically contracting at the point of her orgasm. Usually this has been when I have had a finger inserted & been applying some other stimulation such as a vibrator on her clitoris or whatever. The point of my question is has any couple managed to have this happen while the guy has his cock fully anally inserted & is ejaculating at the same moment? Sort of a synchronised anal cum! I have never managed it but think it might be amazing!

My gf sometimes comes together with me when we do anal sex and she contracts her anus while coming and it feels wonderfull

My wife's anal orgasms begin about 30 seconds following the insertion of my penis. They continue in varying intensity throughout the entire act. Therefore I always ejaculate when she's coming.