Sleeping on one's stomach involuntarily

Q: It is said in the sunnah that it is better to fall asleep on the right side, and that it is disadvised to sleep on the stomach because in the Hadith, it is said:

عَنْ أَبِي هُرَيْرَةَ، قَالَ : رَأَى رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ رَجُلًا مُضْطَجِعًا عَلَى بَطْنِهِ فَقَالَ : إِنَّ هَذِهِ ضِجْعَةٌ لَا يُحِبُّهَا اللَّهُ

Similarly, we hear that it is not advisable to sleep on the left side. Now, if someone starts to lie on the right side. Then, involuntarily during his sleeping, he turns on the left side, or puts himself on the stomatch, will she have the totality of the rewards or not? 

Asking forgiveness from one's relatives

Q: My niece had a proposal fixed n kept meeting in my house.i ws not well yet i cooperated. But she n her mom came late n the boyside came earlier than scheduled time. my husband had gone for namaz. i panicked when she came it was late n i as a hypoglaemic lost my temper due to hunger attack n told her something loudly in kitchen which were insulting words to the boy which he heard in the hall and broke the proposed engagement.since then i m begging for forgiveness from niece her mother,the boy .offering gold n money n even sawab of my umra but my niece refuses to forgive me n has orderd my sister to break relationship wit me.she curses me n uses bad words n filthy language for me n my innocent girl. What should i do now? I m taking treatment for anger issue. I m feeling very sad and depressed.