Tomatoes cross pollination

Hi all I’ve planted an f 1 variety next to my sweet millions and I don’t know if it’s just me but they don’t taste as sweet as the normally do,can cross pollination happen like it can with corn and make it taste poorer 😀

Blame it on the weather 
Tomatoes CAN crosspollinate, but apart from the varieties with large open flowers, they rarely do.

However, any crosspollination, would only affect the seeds and plants grown from them. It would not affect this year's crop.