It is wrong to withhold information from a partner.
Jeff is in a relationship with Tiarah, and they're at the mall shopping.
Jeff needs to give Tiarah feedback on a dress she's considering, which she looks ridiculous in.
Jeff suggests she try a different dress as this look might not be for her.
Jeff tells Tiarah she looks lovely in it.
Tiarah picks a different dress and receives compliments about it the following day.
Tiarah wears it to work the following day and her coworkers make fun of her.