As soon as I finish having sex with my husband, I start leaking the ejaculate. I heard the sperm stays from 3-5 days in women, so why am I leaking?

Cause it's a hole

What you probably heard was that sperm can live for 3-5 days inside a woman. However, gravity will cause the ejaculate to run downwards. The only way to avoid leaking is to make sure that "down" is towards the inside -- i.e. raise your pelvis up.

Some of the sperm, the ones that reach the fallopian tubes, do survive for a few days. However, the fluid that contains them doesn't all travel up the tubes; most stays in the vagina and leaks harmlessly . The more often a man ejaculates, the thinner the fluid is. The solution is the wad up a couple of tissues and place it between your legs and snuggle down to sleep together after you are finished with the passionate part.

BTW, this is also the origin of the snide remark, popular in the seventies, 'Let HIM sleep on the wet spot!'

It's called gravity, sweetheart.

What stays inside of you for 3 to 5 days are the spermazoa, the little swimmers that are racing for the egg in a marathon to be the 1st one to fertilize it (or the 1st and 2nd, in the case of fratenal twins, 1st, 2nd & 3rd for triplets, etc.).

When a man ejaculates, the whole cocktail is a mixture of semen and sperm. Semen is liquidy, it carries the sperm, and it's the sperm itself that's causing the snail-trial behind you after doing the mattress mambo.

(She's married and doesn't know this about human sexual functions?)