Ramshorns

I need some insight: I put a teeny tiny baby ramshorn snail into my elderly betta’s tank about a month and a half ago, she grew insanely quickly then I noticed some eggs on my newly bought plants, I assumed that the plants I bought had some eggs on them and removed them (although some did hatch and I’ve had to manually remove baby snails). However, just yesterday I saw new clutches of eggs, and I’m assuming it’s from her.. But HOW? she’s the only big snail in there (unless tiny specks of snails can breed). Please help a clueless snail grandma out :(