other woman 
noun (the other woman)
The lover of a married or similarly attached man: her husband left the matrimonial home to live with the other woman...
- They had both two-timed her, and then married the other woman in both cases.
- You want him to stop seeing the other woman, but she may want you to do the same.
- His dad left his family when the other woman came to calling and left his mom to raise six kids and work.
- paraphrastically
- paraphrenia
- paraphrenic
- paraphyletic
- paraphyllium
- paraphyly
- paraphysate
- paraphysical
- paraphysis
- Para piassava
- ParaPlane
- paraplasm
- Paraplast
- paraplegia
- paraplegic
- paraplegic games
- Paraplegic Olympics
- parapluie
- parapod
- parapodial
- parapodium
- parapolar
- parapolitical
- parapophysial
- parapophysis