Here is the progression I plan to take:

Clothing - Getting her to show cleavage/ass on a consistent basis

Compliments - Constant compliments to the new change in dress, saying how other guys are looking at her

Self bettermen - I need to start working out and dressing better, get her spark back for me and know I love her

Teasing - Lots more teasing to keep her horny and wanting more

Sex toys - Encourage her with more sex toys

Going out - Take her to places with good looking men so she is comfortable with attention

Dildos/roleplay - Buy her a dildo and create a fantasy not involving me

Acceptance - Convince her that it's ok to want other men and that I'm fine with it

Talk about it - Nudge her to try another man

Get her used to flirting - Take her out and let her have fun with strangers

FUCK ANOTHER GUY