So I Married an Alien by Lyonne Riley

What’s a girl to do when her cat dies and a plague wipes out most of the male population? Why, she marries an alien, of course!

Amara is a party girl with a boring day job, on the search for meaning in her life. When she applies to the Galactic Matching Program looking for an alien husband of her own, she’s paired with Roth’kar, a four-armed Karthinian with adorable antennae. Four arms may present problems when it comes to buying new clothes, but Amara’s excited to find out what else her new husband can do with them.
Roth’kar was raised in poverty on a ship in deep space, scrounging for enough to live. His plan to escape? The Matching Program, where all he has to do is please a human bride for thirty days to earn full residency on Earth, and then he’ll be free to do as he pleases. Though the planet is overrun with strange, dangerous animals—spiders, disgusting!—Roth’kar is thrilled to finally feel the sun on his face.
But he didn’t expect his new wife to be sweet and thoughtful, teaching him the value of kissing, the thrill of clubbing, and the simple joy of a walk in the park. As Roth’kar falls for Amara, will his plans change?

This is a sweet and spicy rom-com (with a little bit of angst) about a strong and silent alien seeking a new life, and the fun, earnest human woman who just wants someone to love. You can expect weird peen, lots of steam, cultural confusion and a heartfelt HEA.