So your wife has a new bf, you have a gf, you want to date a friend you share with your wife as well, PLUS you're moving in 3 months and then all these relationships (potential and actual) will be moot?
Do you really need to have sex with this mutual friend just before moving and seeing her less if never again?
Love withers under constraint; its very essence is liberty. It is compatible neither with envy, jealousy or fear. It is there most pure, perfect and unlimited when its votaries live in confidence, equality and unreserve. -- Shelley
me: Mags, 59, living with:
miss pixi, 37