As thefixer said, most human poses can be used across humans with little to no tweaking of the joings or hands  involved.

However, if you want Jessi specific poses, check out these stores. I haven't searched for freebies though, though I'm sure there must be some out there specific to her.

http://market.renderosity.com/mod/bcs/index.php?vendor=teris

http://market.renderosity.com/mod/bcs/index.php?vendor=sukips

http://market.renderosity.com/mod/bcs/index.php?vendor=nirvy

http://market.renderosity.com/mod/bcs/index.php?vendor=A_

http://market.renderosity.com/mod/bcs/index.php?vendor=Merizon

http://market.renderosity.com/mod/bcs/index.php?vendor=RoxieDee

http://market.renderosity.com/mod/bcs/index.php?vendor=pdm

http://market.renderosity.com/mod/bcs/index.php?vendor=tsk

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi