Why does my sister sometime urinate when she is have sex?

My sister recently told me that she have urinated while having sex beside her boyfriend and wants to know if it's commonplace. Please answer seriously!
Answers:

I have sore boobs, but i enjoy my tubes tied and this has never happen before.?

its pretty ordinary actually, it purely depends on the position her man and her are in. it happen.

Is there a surgery that can net lips smaller or some caring of cream?

often, you can be in a position or own the penis press against a sensitive area that stimulates you to want to "release." that's massively normal except most girls can pedal it and contain themselves from actually peeing

Is at hand any food to make your breasts bigger within 4 days?

Possibly weak kegle muscles...own her do some kegle exercises which would be similar to stopping pee in mid-stream and then starting again...you contract your muscles down near and then hold for 5 second and then release...afterwards repeat.

Trinessa and Acne?

has she been pregnant and given birth ? she could be incontinent from it ..any way, she should see a gyno and urologist.

Wut does it parsimonious when u pop a girl's cherry?

good answers in the previous posts although it may not be urine at adjectives.... it may be female ejaculate.

womanly ejaculate is completely normal.and heck... more power to her!

Check out this site below:

Black discharge, on the pill, term?

now is it actuall urine or is it female ejaculate fluid?

its also best to blank your bladder before and after sex.

b/c of the certainty its a sensitive area and of the pressure, and b/c of germs.
but if she has an uninhabited bladder and thinks she is urinating while have sex, it may actually be she is experiencing womanly ejaculation. this is a very common thing, althought sometimes embarrasing.
but it happen.
so if she isnt emptying her bladder beforehand sex, tell her to start.
and if she is and this still happen she may be emitting a fluid, which isnt urine, its simply like a clear fluid that comes from what some medical professionals telephone call the "female prostate"
no women dont in actuality have a prostate within the same course a man does. but its just pretty much a bud of muscles that control the urethra. its around within there close the "g-spot" you can feel it next to your finger if you do a "come here" motion towards the belly inside the superior wall of the vagina if the woman is lying on her back.
its really organized.
but can be scary or embarrasing
but yeah.
urinate back and after sexual intercourse ALWAYS
for hygiene purposes. b/c bacteria come get pushed up into to the urethra, especailly if you are not using a condom.

if it keep happening, see a GYN.

hope this help