N.H. Rev. Stat. Ann. § 507:8-a

In a proper action, either a wife or husband is entitled to recover damages for loss or impairment of right of consortium whether caused intentionally or by negligent interference. Where fault on the part of the claimant or the claimant's spouse is found to have caused, in whole or in part, the injury to the spouse on which the claim for loss or impairment of consortium is based, damages recoverable shall be subject to diminution to the extent and in the manner provided for in RSA 507:7-d.