redheadspy:

It had taken some time and a lot of hints and suggestions, but Natasha had finally convinced Tony to take a few days off and go somewhere else. Natasha was getting cabin fever and had to get out of the penthouse for a little while. She would shoot someone if she didn't get a change of scenery and she would need her husband around after the baby came.

It was nice on Martha's Vineyard this time of the year and it was close enough to New York that if something happened they could get home easily enough. The yacht was nice, but Natasha wanted dry land under her feet and places to shop. She loved the small quaint shops on the Vineyard and she would convince her husband to take her shopping.

They got settled in at Tony's house on the Vineyard after a four hour drive (and many stops to use the bathroom) and a short ferry ride over to the island. As soon as they were settled, Natasha went to find her husband to see if he wanted to go for a bite to eat. Someone was demanding french fries.

swashbuckler:

The different clothes, the dyed hair, a ballcap, and sunglasses made for a reasonable disguise.  Probably wouldn't fool many for long, but long enough to get them where they needed to go.

He wasn't paying attention to the Stark Industries tour guide, though he would, to most people watching, look like he was.  Years of slacking off in classes and pretending to pay attention that way, at least, had paid off.  His real focus was on Anya, waiting for her to tell him when they needed to slip away, so they could track down...

Whoever it was that was impersonating him.  Or duplicating him.  Or...  he didn't know.  There were too many damn possibilities in this world for this kind of thing.