Boyfriend slept with his mom until he was 13?

When i heard this- i was kinda grossed out and judged him a little. Although by the age of 12 he started making a pallet on the floor, he slept with his mom until 13. She always jokes about him being the 3rd person in the "relationship" in regaurds to her and his step dad.

Is this weird?
Boyfriend slept with his mom until he was 13?
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