Yes, it's completely normal. Fanfic is a popular form of literature among many people, and your gf is no exception. It's just another way for her to engage with stories she loves.
Another option is to include your girlfriend more in group activities rather than one - on - one interactions with your friend. This way, she'll be less likely to single out your friend for teasing. For instance, organize group outings or game nights where the focus is on the whole group rather than individual interactions.
I don't think it's a good idea in most cases. Your relationship with your girlfriend is about the two of you now. Bringing up an ex - love story might make her feel like she's competing with a ghost from your past. Also, some details of past relationships are private and don't need to be shared. If she asks directly, you could be honest but still keep it very general and not overly detailed.
If your gf reads fanfic, you could try to show an interest in it too. Maybe ask her to recommend some good ones to you. It can be a great way to bond over something she likes.
If you suspect your girlfriend is cheating for the first time, the first thing is to stay calm. Don't jump to conclusions right away. Try to have an open and honest conversation with her. For example, you can say something like 'I've noticed some things lately that are making me a bit worried, can we talk about it?' Maybe there are misunderstandings that can be cleared up through communication.
First, communication is key. Everyone involved should sit down and talk calmly about their feelings and concerns. The girlfriend should understand that she can't force her will on the mom. The mom should also express her boundaries clearly. If it's a minor issue, a compromise might be found, like finding a middle ground for a decision. For example, if it's about a party at home, they can discuss and plan it together so that both are satisfied.
Be honest but brief. Just mention the basic facts like how long the relationship was and why it ended. Don't go into details about the romantic moments you had with your ex.
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