I have been with my present company for quite a while and i have planned to invite all my co workers to the reception. Last month my boss hired on a new employee and she use to date my fiancé 2 years back, (it ended badly). I have been friendly with her to avoid work drama, and put the past behind. So do add her to the guest list so she doesn't feel excluded or invite her and hope her and my fiancé aren't awkward??