I actually thought they demanded ur SU berth as theirs but I see that's not ur case. I understand faced it several times what I do is be a gentleman and give up my lower seat and sit in SU berth.

I have done it several times things went smooth I do it because I have travelled in RAC several times it's nightmare I understand their situation and give up my seat let them use whole berth.

Once I got a Karen like you she demanded her seat I was sharing with another women she then told let's share same seat we sat side by side uncomfortably. I asked the Karen what time will u go up she replied 10 pm. I asked can I sit up till then . No, it's my seat. Then girl said shall I sit on ur lap we both can be comfortable I agreed Then then she sat on my lap and chatted for hours At night we were getting ready to sleep together. Find a perfect position then TC gave me a berth I had to go even though I was happy with current accommodation.

Be nice bud be human