Chiro, yes in many Asian cultures, the parents frown on premarital sex if one is raised as a woman. Less so for men, because of rigid gender roles. Some Indian groups still practice arranged marriage too. And yes, going on vacation with your parents, especially south asian traditional parents, means no sex on vacation. Really can't overstate this. I know people who are raised that petting and making out shouldn't be done until you're married.

Here's a link I found on Indian concepts of sexuality: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3705691/

Many second generation immigrants face a culture clash between the dominant western culture and their parents raising them...

You may like the movie "the big sick". Gives you an idea. Though it's about a Pakistani guy with Muslim Pakistani immigrant parents, it's really relevant to traditional religious Indian family culture norms too. Especially the part about dating / courtship, marriage, overbearing parents bigg on emotional manipulations. Not accepting their child grew up westernised. One line by the protagonist who loves a white woman (she is a therapist!) says he's fighting generations of culture.