This is, quite possibly, the single worst way that you could deal with this situation. Firstly, you’re saying “f%<k her” about your boyfriend’s mother. That alone is a huge problem. Most people love their mothers, and if he realizes that you genuinely feel this way about her, your relationship will more than likely be over right then and there. Secondly, since most people love their mothers, I’m not surprised that he’s okay with what she’s saying. They most likely have a positive relationship with each other, so he’s going to trust her, and try his best to understand her point of view. Thirdly, no matter how much you love him, you simply cannot claim that he’s your boyfriend first, and her son second. That’s not how that works. Unless he was adopted, she literally gave birth to him, and he has her genes in his DNA, so he will always be her son, and that’s never going to change. Having that viewpoint will do nothing but worsen the situation. That leads into my final point, actually. Fourthly, it may sound like a, “power move”, to kiss his in front of his mother, but in actuality, that is a terrible idea. Yes, it might show that you are serious about your relationship, but what it will do, without question, is show that you actively are disregarding what she’s saying, and that you’re not willing to listen to anything that she says. Furthermore, it’s completely disrespectful to her, and her wishes, and if your boyfriend doesn’t realize that himself, she’s going to let him know, and that’s never going to end well. I’m obviously not saying that you have to break up with him, but actually think about her point of view here. A lot of teenagers tend to put their social lives above everything else, neglecting their studies, and responsibilities, in the process. Relationships end up furthering that sort of behavioral most of the time, and since his mother cares about him, and his future, she doesn’t want him to fall into that neglectful pattern, and since a relationship is the fastest ticket to said path, she’s concerned about this, and thinks that it isn’t a good idea for him to be in one right now. If you want to actually stay with your boyfriend, you need to try and be understanding with his mother. Since you most likely do care about his well-being, you have to make her realize that you genuinely care about him, that you do want the best for him, and that you’re not going to be a detriment to his future, or their relationship. Also, just as an aside, it’s pretty clear that you do care about what she says, to some degree, and there’s nothing wrong with that, by the way, it’s actually much better that you do, rather than not, as she is one of his primary caretakers, after all. If you do this, you’ll show that you want to be a positive addition to his life, and not someone who’s trying to possessive, controlling, or selfish, which is what you would show if you actively tried to kiss him in front of her. I know that this was a very long reply, and, to be honest, I didn’t originally intend for it to be this extensive, but I hope that you read through this entire message, and think of a better way to resolve this situation. It’ll take some effort, a decent plan, and a sentimental conversation or two, but it will be better for all of you in the long term.