Perhaps it was part of a magic show or a skit at home. Mom was playing the role of a clumsy magician and during the act, she was supposed to sit on a chair but instead landed on your face. It made for a really funny and memorable family moment.
One story could be when I was little and got hurt while playing. Mom sat on my lap to clean my wound and tell me it would be okay. It was a really warm and reassuring moment.
There was a time when we were waiting for a bus in the cold. Mom sat on my lap to keep me warm. She wrapped her arms around me and told me stories to pass the time. It was a cold day outside but so warm in her embrace.
Definitely not a common expression. It could imply that mom's actions or words were so obstructive to the story that it was as if she was using an extreme and inappropriate way to'sit on' it. For example, if the story was about a personal achievement and mom immediately started talking about her own experiences instead, it could feel like she was taking over the story in a very unappealing way.
You could try to be polite and just laugh it off as an accident, although it's really hard. For example, you could say something like 'Oh, that was unexpected!' in a light - hearted way.
Maybe it was during a pretend - play scenario. You were playing 'hide and seek' and you hid under a blanket. Mom didn't see you clearly and sat on the blanket which was over your face. But then she quickly realized and it turned into a fun little moment.
No, it is not appropriate. Such stories involving family members in an overly intimate or improper context should be private and not shared publicly as it goes against social and moral norms.
Oh, that's really an embarrassing situation. Well, I don't know the exact details of your story, but it must have been quite a shock. Maybe it was an accident, like she couldn't hold it in at that moment. It's not a pleasant experience at all for you.
That's really an embarrassing and strange situation. But without more details, it's hard to say exactly what happened during this 'twister' incident. Maybe they were playing twister and in an awkward position when it occurred.
Oh, that's such an awkward story. It could be that you were sitting close to her, perhaps on a small couch or in a crowded room. She might not have been aware of what was about to happen. It's really not a situation anyone would want to be in. You probably felt shocked and disgusted at first. And then it might have been difficult to face your friend or his mom again without thinking about that incident.