 Ron 's second ex @-@ wife , Pawnee library director Tammy ( Megan Mullally ) , appeared in the episode " Ron and Tammy , " where Tammy tricks Leslie into arranging a reunion meeting with Ron under the guise of wishing to work out her differences with him . In fact , Tammy schemed to get Ron to give her the rights to land Leslie plans to turn into a park , so Tammy can build a library branch there instead . During their meeting , Ron and Tammy start loudly arguing , but eventually have passionate sex and get back together . Unable to resist Tammy 's charms , Ron asks Leslie to break up with Tammy for him . When Leslie stands up to Tammy in Ron 's defense , he is moved by what he describes as the first time any woman has put his needs before her own , and it gives him the strength to finally break up with Tammy . 
