Hello..
Some of the sperm will come out after making love,

but to make sure most of them stay in there you should have your hubby go soft in side you (don't pull out right after while he is still hard) then quickly stuff some pillow under your butt..
Some ladies use a product called cups and the stuff that in there whooha after sex to make sure nothing drips out...
I hope I helped you a little..
Trish