Curate, connect, and discover
When You Assume Wrong
by TentativeTreason
Tony is hiding something.
The Avengers notice the little discrepancies in Tony’s behaviour, and they eventually come to the only conclusion they can think of: Tony is having an affair.
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(i.e. Tony Stark and May Parker co-parent Peter and somehow the Avengers translate this into him cheating on Pepper)
Does anyone remember the name of that fic where the rogues think Tony is cheating on pepper with may because he keeps disappearing to meet with peter and they overhear a phone conversation where he says I love you?
Edit: I found the fic thanks you guys