Futanari Fourway …for Science! (ffff, futanari on female, MILF, older younger)

Not two weeks after the sexy accident in the previous book two cute but hungry researchers at Chase labs order a pizza, only to have the cute tomboy pizza delivery girl knock into a table and spill a strange chemical all over the lab! The acting head of night security, a tough, no-nonsense mature beauty named Vanessa watches in horror on her security cameras and races to the scene of the accident only to discover that a strange and wonderful transformation has begun to endow all of the hot young women with very big surprises! Even worse, the emergency blast doors lock shut trapping Vanessa inside the lab with the three horny young girls. How will this mature silver fox make it out before things get too crazy? More importantly, once the neglected mature beauty she sees the massive, hard, and throbbing secrets they hide, will she event want to?