what will be my life after my sister's marriage?

My mumma, thinking of what I will do after my sister's marriage?
I never seen her so much tense, but she never showed me any sign of it...! that's the mom is..! I am perplexed..Am i doing right? i don't want to hurt anyone..that's what i did till now and will do till the end..I am lacking in balancing the things, but still learning it...! Don't know what gonna happen..!