This is NOT Bakemonogatari, but rather some random NTR eroge. If you get your images from random image boards like 4chan, don't take the bullshit you read at face value.

This is from 他の男の精液で孕んでもいいですか…？3僕の知らない所でイキ狂っていた最愛彼女――生真面目な学園副会長――