Well plotted take on the 'captured human female meets alien with compatible body parts' theme. The aliens are huge, vastly over-protective and put their mates' needs in all ways (hint) before their own. 
 Romantic ... panty melting ... erotic? Yes, all of that, on that spectrum, towards the right, without being kinky. 
 The sexy parts were not so interesting for my male libido, however. I felt protective of the women, without more engagement of my imagination. 
 I liked this free first book enough to buy and quickly read the other books in the series.