Mother in law

Ok sooooo my boyfriend and I use Preseed at times and some how he had the box that it comes in at his mothers house ...well it was in a bag to go in the trash,but somehow his mother found it ...Well she's always I mean always been cool and so nice to me ...but lately I notice she's been acting weird towards me...Well he told me she found it cause she asked him what it was...well it's like WTF why is she acting weird towards me...EVERY SINCE SHE FOUND THE PRESEED BOX...Konw matter what we're still going to BD so what's the problem with her????WHAT DO YOU GUYS THINK????