Thought i got close to dry-O, but blew a big load in the end

Last nite my wife decided to give me a treat by offering a prostate massage and it was the first time that she offered herself. not sure why tho, maybe my bday is coming soon? lol
Was very excited when i heard that and made me horny the whole nite and cos of that, she could easily find my prostate as it swelled up just with a few light stimulation instead of the usual few minutes digging and find almost nothing.

Cut short to the orgasm part,
it is also the first time that i have this kind of sensation. try my best to describe.

While orgasm, I could feel pleasure coming in pulses while my precum also leaking out in pulses. The pulse react perfectly to each of her stroke. Each wave/pulse is very pleasurable but still manage in control of myself eg: i could make myself to look at wave of precum squirting out. I just relax myself while feeling each of the pleasure pulse pushing out my precum.

JUST when i thought i having a good dry-o and enjoying it, it suddenly became a full blown wet orgasm. During that time, a very strong urge of blowing out all of my cum made me lifted my hips up in the air violently, my wife who sit in front of me told me that my lifted hips at that time was at the same level as her eyes. lol imagine the intensity. I even managed to hurt her wrist a lil as she need to follow my violent hips movement. Ouch! Felt sorry for her.
BUT, the pleasure only lasted a few seconds. Not what i wanted, wish the pleasure last longer

The outcome:
Manage to blew the biggest cum in my life. Luckily manage to contain the mess. The whole front part of my briefs literally soaked by my cum 😉

gonna try again later to see whether i could make any progress. wish me luck