The age of consent is 16 for male-female sex if both individuals are emancipated. It is 18 if the individual is not emancipated. The twins being 17 and living at home are not emancipated.
"The age of consent is 16 for male-female sex if both individuals are emancipated. It is 18 if the individual is not emancipated. The twins being 17 and living at home are not emancipated."
The only statute I could find went as follows:
IV. Engages in sexual contact with the person when the actor is in a position of authority over the person and uses that authority to coerce the victim to submit under any of the following circumstances:
(a) When the actor has supervisory authority over the victim by virtue of the victim being incarcerated in a correctional
institution or juvenile detention facility; or
(b) When a probation or parole officer has supervisory authority over the victim while the victim is on parole or probation or under juvenile probation.
Source. 1975, 302:1. 1981, 415:4. 1985, 228:4, eff. Jan. 1, 1986. 1997,
220:3, eff. Jan. 1, 1998.
This statute doesn't support your position. Perhaps there is another that I can't find.