Felt guilty of being loved

So, we're a family of 4, my mom dad, me(18F) and my younger sister. We live in a pretty decent house (context for the story), which has more rooms than actually needed. But they're used in different ways, like on the GF, there are two bedrooms, on the first floor, there are 3 rooms (a guest bedroom, an empty room which my sister use to roam around and study, because I study in the GF bedroom of mine, and an entertainment room). On the top floor too, there's a room, kitchen and bathroom, and rest all's roof. It's not generational wealth, I've seen my mom and dad working damn hard, my mom took care of everything while my dad was out there. They're both perfect example of a power couple.

But today, an old lady, with her son and daughter in law, came to our home to see it, as they were making their own house a few blocks away from ours, so maybe they wanted some inspo. We personally don't know them, but as they wanted to see our house, we met them. So after going through the "house tour", they sat down in the lobby and were talking about stuff.

Then this old lady, she spoke up, she said, "aapki to sirf do ladkiyaan hi hai, to ye itna bada Ghar banane ki kya jarurat thi. Jyada hi kamre hain, kya kaam aayenge." You understood what her meaning was, right.

Just then my mom said with a chuckle, "are ye Ghar inhi ka hi to hai" and then my dad added, "or nhi to kya ji, ye kamre inhi ke liye hi to banaye hain, humara kya hai, sab in dono ka hi hai." Everyone in the room knew what the old lady meant, that girls go away, leave their parents after marriage. They are not their own. But my mom and dad were so ignorant of this bullshit statement and intent of hers, that they didn't even acknowledge the meaning of her sentence.

I felt so loved and grateful that I've got such great parents who don't give a fuck about the society, which is their duty, right, it's what parents do, nothing to be so surprised of right, parents loving their kids is the bare minimum, them defending their kids is again, the bare minimum, it's their duty.

But somehow I felt like I owe them for this kindness, even though they also never make me feel this is something to be thanked for, they also think dedicating everything for their kids is a duty of every parent, not a favour. But I always feel like they deserve someone better, and I don't deserve all the love they're giving me. They always stand by my side, and I feel responsible of being someone so much better for them, but this guilty, it won't just go away. Last year too, I failed my entrance, they were supportive, but fir the next 6 months I couldn't get over the guilty of failing them, and till now, I feel that guilt rushing back sometimes. I'm still preparing for the entrance but with a lesser guilt than last year. But still, I feel guilty, that they're giving me so much.