Christians: Is it wrong to lie and tell my cousin her baby is cute when he's really ugly?

I feel so bad thinking that, but it's true. My cousin is pretty, but she married the ugliest man I've ever seen. No exaggeration. I love my cousin and her kids, they're my family and I would die for them...but wow...her son is not a cute baby. The bible says not to lie, so is it wrong to pretend he's cute?