Stellium?

Hello from Europe!

Is this considered a "stellium", in the 5th House? And if, what kind of a stellium?

Thank you! Have a nice day 🌸

P.S. what aspects suggest a 2nd marriage in a natal chart?

Yes you have 3 planets in 5th house it makes a stellium. As far as I know Uranus or sun in 9th makes 2nd marriages

The ruler of your 7th house is being activated by saturn and jupiter so now might be a time of relationship developments.