The way that Tinkerbell and Hook looked at each other suggests they have a history, and that Hook and Tink are attracted to each other. Hook said to Tink, “After all we’ve been through together, a little assitance?” which makes me think they were involved.
Jane Espenson tweeted that they had “sparky” history but also said that if it meant romantic we’d have to keep watching. I do love me some Hookriel but I’m currently heavily cheating with CaptainFairy
I think Tink CAN be trusted, at least to help Hook. She seems to be really into him. Also, there is a reason that Tink didn’t kill Regina. Tink doesn’t want to be dark and Regina knows that, which is why she gave Tink the power to kill her or not. If I had to guess how Tink got to NL, I’d say that Blue banished her there. Or maybe PP recruited her. It’s not totally clear at this stage.
I think she can be trusted, unless you’re Peter Pan. For some reason PP trusts Tink but he shouldn’t. But we can.
I don’t think Tinkermomma works out timeline wise anyway. Assuming Belle is the same age as Snow, Belle would already be a young girl in 303.
Unless all fairies are immortal and never age.