Saudade. Maxim Colonies, #3

The love that remains. Kivia Quigley never expected to be the mother-in-law to an eight-foot-tall pink alien, but she's not complaining. The widow is more than happy to have some joy in her family's life, for a change. And when she meets Dr. Mafer H'looder, a brilliant Veraci scientist, she realizes that, despite their drastic physiological differences, they have a lot more in common than just being able to speak each other's languages. Like grief, longing, and loneliness. And a greedy, megalomaniacal psychopath determined to get what he wants out of both of them. Book 3 in the Maxim Colonies series.
This second-chance sci-fi/space opera romance features a female human and a male four-armed alien paring, a somewhat kinky alien scientist, a seriously angry adversary, aliens who look like aliens, and a guaranteed HEA!