Family being exposed to a drug that makes them fuck each other

[musclelover21]

I forgot the name of this comic, I think its title starts with “the problem with…” but i could be mistaken.
It’s about a family that gets experimented on by the government with a drug that makes the son and mother more muscular, one of the daughters thicker and the other one grows a penis. The father remains the same

 

[rylem]

I think this is what you're looking for: https://forum.allporncomix.com/threads/mitzz-rawly-rawls-the-trouble-with-entrabide-complete.1727/