Somewhat obviously, the sexist-ass chroniclers of the period (or at least everybody I combed through) paid very little mind to women until their marriage, with the exception of those from the most prominent families. With that in mind, most historical women of your generation only crop up when already married. Soooooooooooo -- no they're not. This goes for Mariana (who, for example, already would've had a toddler-aged child OTL) and any potential fine ladies down the line.
Also, while I'm here, if you wanted to get a grip on Renaissance anxieties about the purity and power of women, zoom in on Bosch's Garden and see what you see!