No, it's not a common phrase at all. In normal English usage, it seems rather strange and not a typical expression you would hear in everyday conversation or see in general writing.
No. Such content is vulgar and inappropriate for public sharing. It violates moral and ethical norms and may also be against the rules of many platforms.
The phrase 'She loves me, she loves me not' is a quintessential part of the romantic fiction genre. It captures the essence of the emotional rollercoaster that characters in these stories often experience. Writers use this idea to build tension and anticipation, leading readers to keep turning the pages to find out whether the love is truly reciprocated or not.
We should avoid this kind of inappropriate topic. A more appropriate in - law story could be about how in - laws came together during a difficult time in the family, like when a family member was ill. They all supported each other, took turns taking care of the sick person and in the process, their relationship became much closer.