This is a difficult position for Saturn, as the 5th house is the house of joy, and Saturn takes a strict approach to this.
The 5th house is the heartfelt house, the house of children, hobbies, risk, and it shows us how we fall in love and how we rest. A very difficult position for Saturn - in the house of joy, where one needs to have fun, love, and enjoy pleasure, the opposite for Saturn.
The 5th house shows how we look at the world and how we relate to it, and therefore in this case, the attitude towards life is very serious. A person with such Saturn carefully thinks through every step, they are afraid of making a misstep. Often, they may be shy, and afraid to say something wrong, so as not to look foolish. This is not a risk-taking person, but of course, we look at the sign on the cusp and the presence of other planets in the 5th house. But in pure form, they are unlikely to do anything extraordinary, and if they do go on some adventure, they will calculate every step. They need to be sure of the "reliability of such a risk", so they will always have some constraining factors.
Also, if the question concerns business, they will try to choose the safest option.
Love... The person may be afraid that no one will ever love them. They may indeed be obsessed with the thought - "No one loves me." Therefore, it is very difficult for such a person to open up emotionally and express their feelings, and it may even be difficult for them to truly fall in love. Because it is difficult to overcome the fear that their feelings will be rejected. Of course, the ability to love, desires, will be shown by Venus: in what sign it is, in what house it stands and what aspects it has. But Saturn is in the house of feelings, which means the person treats this topic with caution. They may take a long time to observe their chosen one - "Is he or she showing any interest in me? Is there any reciprocal reaction?" They will evaluate the behavior, actions, everything. In general, they may not understand flirting, as they perceive it seriously. It is difficult for them to take the first step.
In relationships, they may consciously come to the idea that the time has come to start a family, that is, such a reasonable approach manifests itself. However, we look at the chart as a whole, and in matters of the heart, we also consider Venus.
The topic of children. There are often late children, when Saturn returns to its natal position, after 28, 29 years. If there are early children, there may be some problems with them, or no children at all. They often worry about their children, as there are many unconscious fears for them, and therefore they try to constantly control them, teach, educate and guide them. Or there may be some detached relationships, perhaps even at a distance. For example, the child is raised by grandparents, and the parents work somewhere far away, arranging their lives somehow.
It is often said that a person with Saturn in the 5th house does not know how to enjoy and relax at celebrations at all. This is not entirely true, there is a nuance. Let's describe it with an example: imagine that a party is planned, and, as a rule, the owner of Saturn in the 5th house is very tense, because they want the celebration to go perfectly, as it should. For them, this is stress, because they need to think through everything completely, take into account all the details and little things - they cannot mess up. And when everything is already done - and finally the guests arrive, but the tension does not go away - "And is everything enough for everyone? And did they put the cutlery for everyone? And is it good? And are they having fun? And why is he not having fun, and that one is silent the whole evening?" etc. And only when the "official part" is over, and everyone is happy, joyful and full, the tension can subside.
Or the person enjoys when they have really accomplished something serious or difficult, especially if it was done with their own hands. Or the person somehow overcomes themselves, accomplishes the impossible, this is great joy for them. "Wow, I did it!"
Hobbies... May be interested in antiques, some retro style, even in clothes, in music, may prefer this style. May be interested in history, genealogical tree, exact sciences.